The social science majors at your university compare to national mac computer preference norms for college students statistical decision is 5.83.
The gathering, characterization, analysis, and drawing of inferences from quantitative data are all tasks that fall under the purview of statistics, a subfield of applied mathematics. Probability theory, linear algebra, and differential and integral calculus play major roles in the mathematical theories underlying statistics.
Finding valid inferences about big groups and general occurrences from the behaviour and other observable features of small samples is a major challenge for statisticians, or persons who study statistics. These tiny samples are representative of a small subset of a larger group or a small number of isolated occurrences of a widespread phenomena.
Proportion of students who preferred PC's to Mac (P) = 0.62
Sample size (n) = 200
Sample proportion of students who prefer Mac's to PCs = 0.82
To compare the proportion of students with Mac preference for college students a Z-test for single proportion will e conducted. The hypothesis is formulated as follows:
H o: There is no significant difference in the national proportion and college preference
H1 : There is a significant difference in the national proportion and college preference
The test statistic is computed below:
[tex]z=\frac{p-p_0}{\sqrt{\frac{p_0(1-p_0)}{n} } }[/tex]
[tex]z=\frac{0.82-0.62}{\sqrt{\frac{0.62(1-0.62)}{200} } }[/tex]
= 5.8272
Thus, the value of the test statistic is 5.83.
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Find the 8th partial sum of the sequence an=24(–1)n. (picture included)
The sequence's eighth partial total, then, is zero.
A sequence, is it a math?A series is a collection of things that is in order in mathematics. (or events). Similar to a group, it has individuals. (also called elements, or terms). The total length of the series is the number in ordered components (possibly endless).
The sequence is: 24, -24, 24, -24, ...
To find the 8th partial sum, we need to add the first 8 terms of the sequence.
S8 = 24 + (-24) + 24 + (-24) + 24 + (-24) + 24 + (-24)
Simplifying this expression, we see that every pair of adjacent terms cancels each other out, leaving us with:
S8 = 0 + 0 + 0 + 0
Therefore, the 8th partial sum of the sequence is 0.
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Trevor has a bag of counters with 26 red counters and 26 blue counters. he
randomly picks a counter, records the color, places it back in the bag, and mixes
the counters in the bag. the first 5 times he picks a counter, it is red. he thinks the
next counter he picks has a greater probability of being blue than red. is trevor
correct? explain.
The probability of the outcome being a red counter, or a blue counter is equal, therefore Trevor is wrong.
We know that Trevor has a bag of counters with 26 red counters and 26 blue counters and that he has already randomly picked one red counter 5 times but he places them back in the bag again and mixes them, but he thinks that the next counter he picks has a greater probability of being blue than red.
Trevor is wrong as we know that the likelihood of an occurrence is denoted by a numerical value known as probability. This value falls between 0 and 1 or can be represented as a percentage between 0% and 100%. The higher the probability of an event, the greater the chances of its occurrence. An impossible event has a probability of 0, while a certain event has a probability of 1.
To calculate probability, divide the number of ways the event can occur by the total number of outcomes.
Here the probability of the outcome being a red counter or a blue counter is equal, therefore Trevor is wrong.
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Simon is taking A trip from Orlando Fl, to sacremento, California which is about 2,804 miles. On average his car gets 48.6 miles for every 2 gallons of gas. How many gallons of gas does Simon need for his trip? Round your answer to the nearest tenth.
Simon needs approximately 48.6 gallons of gas for his trip from Orlando, FL to Sacramento, CA.
To calculate the number of gallons of gas Simon needs for his trip, you can use the following formula:
Gallons = Miles / Miles per gallon
First, convert the distance of 2,804 miles to miles per gallon by dividing by the car's average mileage per 2
gallons:2,804 / 48.6 = 57.75 mpg
Then, use this value to calculate the number of gallons of gas Simon needs for his trip:
Gallons = Miles / Miles per gallon
Gallons = 2,804 / 57.75
Gallons ≈ 48.6 gallons
Therefore, Simon needs approximately 48.6 gallons of gas for his trip from Orlando, FL to Sacramento, CA.
The answer should be rounded to the nearest tenth, so the final answer is 48.6 gallons.
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The equation for the circumference, C, of a circle is C = 2pi*r . Solve this equation for pi .
The value of π can be found by dividing the circumference of a circle by twice its radius . [tex]\pi =c/2r[/tex]
Starting with the equation: the circumference of circle is
C = 2πr
We can isolate π on one side of the equation by dividing both sides by 2r:
C / (2r) = π
So the solution for π is:
π = C / (2r)
The circumference of a circle is the distance around its outer edge. It is calculated by multiplying the diameter of the circle by pi (π), which is a mathematical constant that represents the ratio of the circumference of a circle to its diameter. Therefore, the formula for the circumference of a circle is C = πd, where C is the circumference, d is the diameter, and π is approximately equal to 3.14. The circumference is an important measurement in geometry and is used to calculate the perimeter of circles.
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Here's a graph of a linear function. Write the
equation that describes that function.
Express it in slope-intercept form.
Enter the correct answer.
DONE
Answer:
the answer is y=6x-6
Step-by-step explanation:
hope this helps
Answer: y = 6x-6
Step-by-step explanation:
If the number of bacteria in a colony doubles every 341 minutes and there is currently a
population of 1,630 bacteria, what will the population be 1,705 minutes from now?
_____bacteria
The pοpulatiοn οf bacteria will be apprοximately 104,320 bacteria 1,705 minutes frοm nοw.
What is expοnential grοwth?Expοnential grοwth is a type οf grοwth in which a quantity increases at a rate prοpοrtiοnal tο its current value.
Tο sοlve the prοblem, we can use the fοrmula fοr expοnential grοwth, which is:
N = N₀ * [tex]2^{(t/d)[/tex]
where:
N₀ = initial pοpulatiοn
N = final pοpulatiοn
t = time elapsed
d = dοubling time
In this case, the dοubling time is 341 minutes. Sο, we can plug in the given values and sοlve fοr N:
[tex]N = 1630 * 2^{(1705/341)[/tex]
N ≈ 104,320
Therefοre, the pοpulatiοn οf bacteria will be apprοximately 104,320 bacteria 1,705 minutes frοm nοw.
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Evan bought 2 burgers and 4 tacos for $22.50. Albert bought
1 burger and 3 tacos for $14.50 How much does the tacos
cost?
O $2.25
O $2.75
O $1.50
O $3.25
Step-by-step explanation: To find the cost of one taco, we can use a system of equations. Let x be the cost of one burger and y be the cost of one taco. Then we have:
2x + 4y = 22.50 x + 3y = 14.50
Multiplying the second equation by -2, we get:
-2x - 6y = -29 2x + 4y = 22.50
Adding the two equations, we get:
-2y = -6.50 y = 3.25
So one taco costs $3.25.
or watch a video clare streams a classical music station while she's doing chores on the weekends. here are the types of musical pieces she has listened to so far this weekend: overture, symphony, sonata, concerto, symphony, sonata, overture, symphony, opera, sonata, concerto based on the data, what is the probability that the next piece clare listens to will be a concerto?
If Clare streams a classical music station while doing chores, then probability that next piece will be a concerto is 2/11.
In order to calculate the probability that the next-piece Clare listens to will be a concerto, we count the number of concertos in the list of pieces she has already listened to and divide by the total number of pieces.
From the given list,
The total number of pieces of music = 11;
The number of concerto is = 2;
So, probability that next piece Clare listens to will be a concerto is:
⇒ P(concerto) = (number of concertos)/(total number of pieces);
⇒ 2/11
Therefore, the required probability is 2/11.
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The given question is incomplete, the complete question is
Clare streams a classical music station while she's doing chores on the weekends. here are the types of musical pieces she has listened to so far this weekend :
{overture, symphony, sonata, concerto, symphony, sonata, overture, symphony, opera, sonata, concerto}
Based on the data, What is the probability that the next piece Clare listens to will be a concerto?
which of the following conditions must be satisfied to perform the appropriate chi-square test using the data from this study? i. the population distribution is approximately normal. ii. the treatments were randomly assigned. iii. the expected counts are all at least 5.
If the expected counts are less than 5, then the chi-square test cannot be performed.
To perform the appropriate chi-square test using the data from this study, the following conditions must be satisfied:
i. The population distribution is approximately normal.
ii. The treatments were randomly assigned.
iii. The expected counts are all at least 5.
The chi-square test is a statistical method that examines whether observed data matches with the expected data.
The chi-square test is used to compare the categorical data between two or more groups. It is a non-parametric test of the statistical hypothesis.
In order to perform the appropriate chi-square test using the data from this study, the following conditions must be satisfied:
1. The population distribution is approximately normal: This means that the population data should be distributed normally. The normal distribution should be checked using a normal probability plot, which shows the data points relative to the standard normal distribution curve.
If the data is not normally distributed, then the chi-square test cannot be performed.
2. The treatments were randomly assigned: The treatments should be randomly assigned to the study participants in order to ensure that the results are not biased.
If the treatments are not randomly assigned, then the chi-square test cannot be performed.
3. The expected counts are all at least
4: The expected counts for each category should be at least
5. This means that there should be a sufficient number of observations in each category. If the expected counts are less than 5, then the chi-square test cannot be performed.
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A circle with a radius of 7 ft is cut into 6 equal pieces. How many sq ft are 2 of the pieces? Use 22/7 for pi
1. 7 1/3 sq ft
2. 14 2/3 sq ft
3. 51 1/3 sq ft
4. 205 1/3 sq ft
a biycle wheel has a radius of 35 cm fine the diameter and circumference
Answer:
diameter= 70
circumference= 219.8
Step-by-step explanation:
to find the diameter, es the doble of radius
35×2=
to fine circumference
πd
3.14× diameter
Put the following equation of a line into slope-intercept form, simplifying all fractions.
3y - 9x = -6
To put the equation 3y - 9x = -6 into slope-intercept form, we need to isolate y on one side of the equation.
First, we will add 9x to both sides:
3y - 9x + 9x = 9x - 6
Simplifying the left side of the equation:
3y = 9x - 6
Next, we will divide both sides by 3:
y = 3x - 2
This is the equation in slope-intercept form, where the slope is 3 and the y-intercept is -2.
Linear inequalities and systems on inequalities review
The points that are in the solution set are (-1, -1) and (2, -1).
How to determine the solution?In order to determine which ordered pairs are valid and true solutions based on the given linear inequalities, we would have to test the given ordered pairs by substituting their values into each of the linear inequality as follows;
For ordered pair (0, 0), we have:
y ≤ -1
0 ≤ -1 (False).
For ordered pair (0, 0), we have:
3x + 4y < 4
3(0) + 4(0) < 4
0 < 4 (True)
For ordered pair (-1, -1), we have:
y ≤ -1
-1 ≤ -1 (True).
For ordered pair (-1, -1), we have:
3x + 4y < 4
3(-1) + 4(-1) < 4
-7 < 4 (True).
For ordered pair (2, -1), we have:
y ≤ -1
-1 ≤ -1 (True).
For ordered pair (2, -1), we have:
3x + 4y < 4
3(2) + 4(-1) < 4
-2 < 4 (True).
For ordered pair (-2, 2), we have:
y ≤ -1
2 ≤ -1 (False).
For ordered pair (-2, 2), we have:
3x + 4y < 4
3(-2) + 4(2) < 4
-6 + 8 < 4
2 < 4 (True).
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binomial expansion??? help me..
The coefficient of [tex]x^{2}[/tex] in binomial expansion is 0
option is d .0
What is binomial expansion?A binomial expansion is a method for expanding and simplifying algebraic statements of the type [tex](x+y)^{n}[/tex] into sum of terms of the form [tex]ax^{b} y^{c}[/tex].
An equation is a statement that determines the equivalence of two expressions joined by the equals sign "=". For instance, 5x - 9 = 10.
5x - 9 and 10 are expressions in this case. "=" is the sign that connects these two expressions.
According to the given information:
Given expanding term is [tex](2x+\frac{3}{x^{3} } )^{8}[/tex]
On cross multiplying and separating power numerator and denominator we get, [tex]\frac{(2x^{4} +3)^{8} }{(x^{3} )^{8} }[/tex]
Expanding the numerator we get [tex]256x^{32}+3072x^{28} +16128x^{24}+48384x^{20} +90720x^{16}+10884x^{12}+81648\\ x^{8}+34992x^{4}+6561[/tex]
Here there is no [tex]x^{2}[/tex],So co efficient of it is 0
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PLEASE HELPP (check my work)
1.a) The total revenue received for CD sales was $12,090,000.
1.b) The total revenue received for downloads was $2,499,000.
1.c) The total amount that Craze-K received in royalties last year was $1,240,065.
2) The total royalties that Mr. Pambruccian received last year were $45,210.01.
How the total figures were determined:a) Rap Singer:Commission = 8.5%
CDs Downloads Total
Number of items sold 1.86 million 2.1 million
Selling price per unit $6.50 $1.19
Total sales revenue $12,090,000 $2,499,000 $14,5898,000
(1.86 m x $6.50) (2.1 m x $1.19)
Sales commission = $1,027,650 $212,415 $1,240,065
b) Books:Royalties = 4%
Selling price per book = $45.99
The total number of books sold = 24,576
The total revenue (sales) = $1,130,250,24 (24,576 x $45.99)
Royalties received = $45,210.01 ($1,130,250.24 x 4%)
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Marcy owns common stock in Rex's Pet Planet. The annual dividend is
$0.68. The current price is $5.07.
What is the percentage yield of the stock? Round to the nearest whole
percent.
to the nearest whole percent, the percentage yield is 13%.
What is the percentage?
A percentage that represents a tenth of a quantity. One percent, denoted by the symbol 1%, is equal to one-hundredth of something; hence, 100 percent denotes the full thing, and 200 percent designates twice the amount specified. A portion per hundred is what the percentage denotes. The percentage refers to one in a hundred. The % sign is used to denote it.
The percentage yield of a stock is calculated as follows:
Percentage Yield = (Annual Dividend / Stock Price) x 100%
Substituting the given values, we get:
Percentage Yield = (0.68 / 5.07) x 100% = 13.43%
Hence, to the nearest whole percent, the percentage yield is 13%.
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The number of free throws that Coach A can make varies directly with the amount of times she spends shooting the baskets. She can make 20 baskets in 30 seconds.
How many free throws can Coach A make in 3 minutes?
Coach A can make 120 free throws in 3 minutes for number of free throws that Coach A can make varies directly with the amount of times she spends shooting the baskets.
What is direct variation?A mathematical connection when two variables are involved in which the ratio of their values is constant is known as direct variation. Alternatively said, if one variable is multiplied by a specific amount, the second variable will also be multiplied by the same value. The two variables in this connection may be represented as a percentage, where the constant of proportionality is the ratio of their values, and the two variables are on opposite sides of an equal sign.
Given that, she can make 20 baskets in 30 seconds.
Thus, using proportion we have:
Free throws / Time = Free throws per unit time
20 baskets / 30 seconds = 2/3 baskets per second
Now, for 3 minutes or 3(60)n= 180 seconds we have:
Free throws = Time x Free throws per unit time
Free throws = 180 seconds x (2/3 baskets per second)
Free throws = 120 baskets
Hence, Coach A can make 120 free throws in 3 minutes.
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a class rolled number cubes. their results are shown in the table. what is the experimental probability of rolling the number 3? round your answer to the nearest tenth.
The experimental probability of rolling the number 3 is approximately 0.2
Experimental probability is the ratio of the number of times an event occurs to the total number of trials or observations conducted in an experiment or a trial. It is an estimate of the probability of an event based on the actual outcome of a series of trials or experiments.
To find the experimental probability of rolling the number 3, we need to divide the number of times the number 3 occurred by the total number of rolls.
From the table, we can see that the number 3 occurred 45 times. The total number of rolls is
42 + 44 + 45 + 44 + 47 + 46 = 268
So, the experimental probability of rolling the number 3 is
45/268 = 0.168 (rounded to the nearest tenth)
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The given question is incomplete, the complete question is:
A class rolled number cubes. their results are shown in the table. what is the experimental probability of rolling the number 3? round your answer to the nearest tenth.
A block of glass has a volume of 29cm cubed and a density of 2.694g/cm cubed
Work out the mass of the block of glass
Give your answer correct to 2 decimal places
Answer:
Step-by-step explanation:
mass=density* volume
78.12
Luther's class recorded how many states each student has visited.
States visited
) Number of states
) Name
Luther
Amelia
Oliver
Katie
Emilio
Joe
Dustin
2
5
2
3
1
) What is the median of the numbers?
The median of the given numbers is 2.5.
its formula and examples are explained. In Mathematics, the median is defined as the middle value of a sorted list of numbers. The middle number is found by ordering the numbers. The numbers are ordered in ascending order. Once the numbers are ordered, the middle number is called the median of the given data set.
Given, Number of states visited by the students in Luther's class are:
Luther - 2 states
Amelia - 5 states
Oliver - 2 states
Katie - 3 states
Emilio - 1 state
Joe - 0 states
Dustin - 0 states
Arranging these numbers in ascending order, we get:
0, 0, 1, 2, 2, 3, 5
The median is the middle number when the numbers are arranged in order.
As there are an odd number of numbers, there is only one number that is exactly in the middle, which is 2.
Therefore, the median of the given numbers is 2.5.
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a line has a slope of -2 and a y-intercept of 0 write its equation in slope-intercept form
Answer:
y = -2x.
Step-by-step explanation:
The slope-intercept form of the equation of a line is:
y = mx + b
where m is the slope of the line, and b is the y-intercept.
In this case, the slope is -2, and the y-intercept is 0. So we can substitute these values into the slope-intercept form of the equation:
y = (-2)x + 0
Simplifying, we get:
y = -2x
the equation of the line in slope-intercept form is y = -2x.
an urn contains one red ball and one blue ball. a box of extra red and blue balls lie nearby. george performs the following operation four times: he draws a ball from the urn at random and then takes a ball of the same color from the box and returns those two matching balls to the urn. after the four iterations the urn contains six balls. what is the probability that the urn contains three balls of each color?(2020amc10b problem 18) (a) 16 (b) 1 5 (c) 1 4 (d) 1 3 (e) 12
After four iterations of drawing and replacing balls, the probability that the urn contains three red and three blue balls is 1/3. so, the correct answer is D).
Let's consider the possible outcomes after each iteration of the process. We will use R and B to denote a red and blue ball, respectively.
After the first iteration, we have two possible outcomes:
R, R: The urn contains two red balls.
B, B: The urn contains two blue balls.
After the second iteration, we have four possible outcomes:
R, R, R, R: The urn contains four red balls.
R, R, B, B: The urn contains two red balls and two blue balls.
B, B, B, B: The urn contains four blue balls.
B, B, R, R: The urn contains two red balls and two blue balls.
After the third iteration, we have six possible outcomes:
R, R, R, R, R, R: The urn contains six red balls.
R, R, R, B, B, B: The urn contains three red balls and three blue balls.
R, R, B, B, R, R: The urn contains four red balls and two blue balls.
R, R, B, B, B, B: The urn contains three red balls and three blue balls.
B, B, B, B, B, B: The urn contains six blue balls.
B, B, R, R, B, B: The urn contains four blue balls and two red balls.
After the fourth iteration, we have six possible outcomes, one for each of the outcomes after the third iteration. In particular, we are interested in the outcomes where the urn contains three red balls and three blue balls, which occur in two of the six outcomes.
Therefore, the probability that the urn contains three balls of each color after the four iterations is 2/6 = 1/3, which is answer choice (d).
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--The given question is incorrect, the correct question is given
" an urn contains one red ball and one blue ball. a box of extra red and blue balls lie nearby. george performs the following operation four times: he draws a ball from the urn at random and then takes a ball of the same color from the box and returns those two matching balls to the urn. after the four iterations the urn contains six balls. what is the probability that the urn contains three balls of each color?(2020amc10b problem 18) (a) 16 (b) 1/5 (c) 1/4 (d) 1/3 (e) 12 "--
a 2-column table with 4 rows. column 1 is labeled situation with entries increasing, difference, finding part of a total, sharing or grouping. column 2 is labeled operation with entries , minus, times, divided by. filipe practiced 12 fewer hours than bianca. if filipe practiced for 16 hours, how long did bianca practice? bianca practiced for hours.
Bianca practiced 28 hours a day whereas Filipe practiced 12 fewer hours than Bianca, if Filipe practiced for 16 hours
below are the situations and the operations used
Rising = +
difference = -
to find the part of the grand total= ÷
Sharing or Grouping = *
Since "Filipe trained 12 hours less than Bianca" and "Filipe trained 16 hours", we can use rising(+) to find the amount of time Bianca trained.
it is calculated by using the following formula
Bianca's training time = Filipe's training time + 12
Bianca practice hours = 16 + 12
Bianca Practice Hours = 28
So Bianca practiced 28 hours a day.
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HELP!!
Sally Brown bought a house with a 10% adjustable rate mortgage for 20 years. She was paying $9.66 monthly per thousand on her original loan. At the end of 4 years she owes the bank $55,000. Interest has now gone up to 12%, the bank can renew the mortgage at this rate or Sally can pay the full $55,000. Sally renews the mortgage and will pay $11.02 monthly per thousand on this loan.
What is the amount of the old and new monthly payment? What is the percent of increase in her new monthly payment (to the nearest tenth)?
old payment = $
new payment = $
% increase
As a result, the percentage decrease in her new monthly payment is 18.1%. (to the nearest tenth).
How to calculate the monthly payment?To begin, we must determine the original loan amount. Using the information provided, we can construct the following equation:
$55,000 = P(1 + 0.10)^4
P denotes the original loan amount.
When we solve for P, we get:
P = $38,574.09
The old monthly payment is calculated as follows:
$38,574.09 / 1000 x $9.66 = $372.64
We must now compute the new loan amount. Because Sally renewed her mortgage at a 12% interest rate, we can apply the same formula as before, but with a new time period of 16 years (since 4 years have already passed):
Now, we need to calculate the new loan amount. Since Sally renewed the mortgage at a 12% interest rate, we can use the same formula as before, but with a new time period of 16 years (since 4 years have already passed):
$55,000 = P(1 + 0.12)^16
Solving for P, we get:
P = $27,703.25
The new monthly payment can be calculated as:
$27,703.25 / 1000 x $11.02 = $305.23
To find the percent increase, we can use the following formula:
percent increase = ((new value - old value) / old value) x 100
Plugging in the values, we get:
percent increase = (($305.23 - $372.64) / $372.64) x 100 = -18.1%
So the percent of decrease in her new monthly payment is 18.1% (to the nearest tenth).
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joe is considering pursuing an mba degree. he has applied to two different universities. the acceptance rate for applicants with similar qualifications is 25 percent for university a and 40 percent for university b. what is the probability that joe will be accepted at one, and only one, university? question 9 options: 0.50 0.10 0.15 0.30 0.45
The probability that Joe will be accepted at one, and only one, the university is E. 0.45.
The probability that Joe will be accepted at one, and only one, university can be calculated using the following approach. First, we need to find the probability of Joe being accepted at each university individually and the probability of him not being accepted at each university. The acceptance rate for applicants with similar qualifications is 25 percent for University A and 40 percent for University B.
Let's use the following notations:
P(A) - probability of being accepted at University A
P(B) - probability of being accepted at University B
P(A') - probability of not being accepted at University A
P(B') - probability of not being accepted at University B
We are given:
P(A) = 0.25
P(B) = 0.40
To find the probability of not being accepted, we subtract the probability of being accepted from 1:
P(A') = 1 - P(A) = 1 - 0.25 = 0.75
P(B') = 1 - P(B) = 1 - 0.40 = 0.60
Now, we want to find the probability of Joe being accepted at one university and not at the other. There are two possibilities:
(1) he gets accepted at University A and not at University B or
(2) he gets accepted at University B and not at University A.
We can use the multiplication rule for independent events and the addition rule for mutually exclusive events to calculate this probability:
P(A and B') + P(A' and B)=
P(A) * P(B') + P(A') * P(B) =
(0.25 * 0.60) + (0.75 * 0.40) =
0.15 + 0.30 = 0.45
So, the probability that Joe will be accepted at one, and only one, university is 0.45. Therefore, the correct option is E. 0.45.
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what is the circumference and area of a circle that is circumscribed about a square with sides of 10cm
The circumference of the circle is approximately 31.42 cm and the area of the circle is approximately 157.08 cm².
A circle circumscribed about a square with sides of 10cm has a circumference of approximately 31.42 cm and an area of approximately 157.08 cm².
If a circle is circumscribed about a square, the diameter of the circle is equal to the diagonal of the square. In this case, the diagonal of the square is:
d = √(10² + 10²) = √(200) = 10√(2) cm
The radius of the circle is half the diameter, so:
r = 5√(2) cm
The circumference of the circle is:
C = 2πr = 10π√(2) cm
The area of the circle is:
A = πr² = 50π cm²
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you are skiing down a mountain with a vertical height of 1150 feet. the distance from the top of the mountain to the base is 2300 feet. what is the angle of elevation from the base to the top of the mountain?
When skiing down a mountain with a vertical height of 1150 feet and a base-to-top distance of 2300 feet, the angle of elevation from the base to the top of the mountain is approximately 26.56 degrees.
When skiing down a mountain with a vertical height of 1150 feet and a base-to-top distance of 2300 feet, the angle of elevation from the base to the top of the mountain is given by tan⁻¹(1150/2300).
How to find the angle of elevation from the base to the top of the mountain?
The angle of elevation of an object from a point is the angle between the horizontal and the line of sight from the observer to the object above the horizontal. We can use the inverse tangent function to calculate this angle of elevation.
Step 1: Find the tangent of the angle of elevation: Let the height of the mountain be h and the distance from the base to the top of the mountain be d. Then tan(θ) = h/d.
Step 2: Inverse tangent of the height and distance of the mountain: Take the inverse tangent of the quotient to find the angle of elevation from the base to the top of the mountain. θ = tan⁻¹(h/d).Here, h = 1150 feet and d = 2300 feet. Substituting these values in the formula θ = tan⁻¹(1150/2300), we can find the angle of elevation from the base to the top of the mountain.θ = tan⁻¹(1150/2300) = 26.56 degrees.
So, the angle of elevation from the base to the top of the mountain is approximately 26.56 degrees.
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How to do volume of revolution around a line that isn’t x or y axis like for example x = 1 I’ll give brainless to the correct answer
In order to determine the volume of a solid of revolution revolving around an axis that is alternatively the x or y-axis, the technique of cylindrical shells can be employed.
What are the required steps?The general steps for doing this are as follows:
First, recognizing the area to revolve and the central axis must take place.
Second, an expression for the distance from the pivotal point to every single point within the region should be established; let us denote this distance as 'r'.
Then, discovering the measurement of each individual cylindrical shell can also be necessary by obtaining the distinction between two separate vertical points within the region; we shall refer to this tallest height identified as 'h.'
Lastly, setting up an integral expression for the volume of every encompassing cylindrical shell can bring forth more specific results.
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at a financial services company, the mean percent allocation for bonds in a retirement portfolio is 26.9 percent with a population standard deviation of 3.6 percent. a random sample of 35 retirement plan participants was taken and the probability that the mean bond percent for the sample will be at least 28 percent was determined. was the probability a left-tail, right -tail or interval probability? what is the probability that the mean bond percent for the sample will be at least 28 percent? select all that apply below. select the two correct answers that apply below. you may use a calculator or the portion of the z-table given below. round your answer to three decimal places if necessary.
The probability in question is a right-tail probability because it is asking for the probability that the mean bond percent for the sample will be at least 28 percent, which is greater than the mean of 26.9 percent.
To calculate the probability, first find the z-score:
z = (sample mean - population mean) / (population standard deviation / sqrt(sample size))
z =[tex] (28 - 26.9) / (3.6 / sqrt(35))[/tex]
z = [tex] 1.1 / (3.6 / 5.916)[/tex]
z =[tex] 1.1 / 0.608[/tex]
z ≈ [tex] 1.809[/tex]
Using the z-table, the area to the left of this z-score is 0.965. Since we are looking for the right-tail probability, we need to subtract this value from 1:
Probability = 1 - 0.965
Probability ≈ 0.035
Thus, the probability that the mean bond percent for the sample will be at least 28 percent is approximately 0.035. The correct answers are right-tail probability and 0.035.
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to find the height of a building, a 7 -foot basketball player places a mirror on the ground 100 ft from the base of a building. standing 8 ft on the other side of the mirror, he looks into the mirror and sees the top of the building. how tall is the building
The height of the building is 87.5 feet.
To find the height of the building, we will use similar triangles.
1. Draw a diagram with a right triangle formed by the basketball player, the mirror, and the top of the building.
Label the height of the building as 'h', the distance between the mirror and the building as 100 ft, and the distance between the mirror and the basketball player as 8 ft.
2. Draw another right triangle formed by the basketball player, the mirror, and the ground. Label the height of the basketball player as 7 ft.
3. Since the two triangles are similar, we can write the following proportion:
(height of the building) / (distance between mirror and building) = (height of basketball player) / (distance between mirror and basketball player)
4. Plug in the values: h / 100 = 7 / 8
5. To solve for the height 'h', multiply both sides by 100: h = (7 / 8) * 100
6. Calculate the value of 'h': h = 87.5 ft
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