DUE TODAY PLEASE HELP WELL WRITTEN ANSWERS ONLY
Here is a point at the tip of a windmill blade. The center of teh windmill is 6 feet off the ground and the blades are 1.5 feet long. Write an equation giving the height h of the point P after the windmill blade rotates by an angle of a. Point P is currently rotated π/4 radians from the point directly to the right of the center of the windmill.
Answers
the height of point P after the windmill blade rotates by an angle of a is approximately 1.1908 feet.
What is Trigonometric Functions?
Trigonometry uses six fundamental trigonometric operations. Trigonometric ratios describe these operations. The sine function, cosine function, secant function, co-secant function, tangent function, and co-tangent function are the six fundamental trigonometric functions. The ratio of sides of a right-angled triangle is the basis for trigonometric functions and identities. Using trigonometric formulas, the sine, cosine, tangent, secant, and cotangent values are calculated for the perpendicular side, hypotenuse, and base of a right triangle.
To find the height h of point P, we can use the sine function, which relates the opposite side of a right triangle (in this case, the height h) to the hypotenuse (in this case, the length of the windmill blade, which is 1.5 feet). The angle between the opposite side and the hypotenuse is the complement of the angle of rotation a, which is π/4 radians minus the angle between the ground and the windmill blade, which is arctan(6/1.5) or approximately 1.3258 radians.
So, the equation for the height h of point P after the windmill blade rotates by an angle of a is: h = 1.5 sin(π/4 - arctan(6/1.5))
Therefore, the height of point P after the windmill blade rotates by an angle of a is approximately 1.1908 feet.
Learn more about Trigonometric Functions, by the following link.
brainly.com/question/24349828
#SPJ1
Related Questions
PLS HELPP ME NOWWWWW ASAP
Answers
Answer:
A
Step-by-step explanation:
the Least common factor is 12
17/3 (x-3/2) =-5/4
17/2x -17/2 =-5/4
12*17/3x -12*17/2 = 12*-5/4
4*17x - 6*17= 3*-5
68x -102= -15
68x= 102-15
68x= 87
x=87/68
Jose used the equation h - 130 = 75 to find the height in feet h of a hot air balloon before it began to come down. What was the height of the hot air balloon before it began to come down?
Answers
h - 130 = 75 demonstrates that h = 205 is a legitimate solution to the equation of height of hot air balloon.
How is height determined via linear equation?
We must discover the solution to the equation h - 130 = 75 for h, where h is the height of the balloon in feet, in order to determine its height before it started to descend.
We can increase both sides of the equation by 130 to isolate h:
h - 130 + 130 = 75 + 130
Simplifying:
h = 205
As a result, the hot air balloon reached a height of 205 feet before starting to descend. By substituting h = 205 into the original equation and confirming that it is satisfied, we may confirm this:
h - 130 = 75
205 - 130 = 75\s75 = 75
This demonstrates that h = 205 is a legitimate solution to the equation and, consequently, the hot air balloon's actual height.
know more about linear equation visit:
brainly.com/question/11897796
#SPJ1
Help me please, since there are two answers and I can’t get a good grade without both
Answers
The value of x for the equation I s derived to be equal to -0.8354 using logarithm.
How to evaluate for x using logarithmTaking the logarithm of both sides of the equation to base 10, we get:
log(4^(-x + 4)) = log(17^(-5x))
Using the power rule of logarithms, we can simplify both sides of the equation as;
(-x + 4) log(4) = (-5x) log(17)
Distributing the lig(4) and log(17), we get:
-xlog(4) + 4log(4) = -5xlog(17) {all in base 10}
5x log(17) - xlog(4) = 4 log(4) {collect like terms}
x[5log(17) - log(4)] = 4log(4)
x = 4log(4)/[5log(17) - log(4)] {divide through by the coefficient of x}
x ≈ -0.8354
Therefore, the value of x for the equation I s derived to be equal to -0.8354 using logarithm.
Read more about logarithm here:https://brainly.com/question/237323
#SPJ1
a computer selects a number from 0 to 5 randomly and uniformly. round all answers to 4 decimal places where possible. what is the distribution of ? ~ u( , ) suppose that the computer randomly picks 39 such numbers. what is the distribution of for this selection of numbers. ~ n( , ) what is the probability that the average of 39 numbers will be less than 2.7?
Answers
The distribution of U is 0.8634.
The distribution of for this selection of numbers ~ n is 2.7.
The probability that the average of 39 numbers will be less than 2.7 is 80.69%.
Let X be the random variable that represents the number selected by the computer. Since the computer selects a number from 0 to 5 uniformly, the distribution of X is a discrete uniform distribution. This means that each number from 0 to 5 has an equal probability of being selected, which is 1/6 or approximately 0.1667
Population standard deviation = (5-0)/(12) = 1.4434
Therefore, the standard deviation of the sample mean for a sample size of 39 is:√
Standard deviation of sample mean = 1.4434/√(39) = 0.2319
To calculate the probability that the average of 39 numbers will be less than 2.7, the population mean (in this case, 2.5), σ is the population standard deviation, and n is the sample size.
Using the values we have calculated, we get:
z = (2.7 - 2.5) / (0.2319) = 0.8634
To find the probability of the sample mean being less than 2.7, we need to find the area under the standard normal distribution curve to the left of z = 0.8634.
The distribution of the sample mean for a sample size of 39, and the probability of the average of 39 numbers being less than 2.7.
This can be done using a standard normal distribution table or a calculator that can perform normal distribution calculations. The probability turns out to be approximately 0.8069, or 80.69%.
To know more about probability here
https://brainly.com/question/11234923
#SPJ4
can yall help me please?
Answers
The mean travel time for the 7 students is approximately 8.6 minutes, and the median travel time is 8.5 minutes.
To find the mean travel time, we need to add up all the travel times and divide by the total number of students:
Mean = (8 + 14 + 12 + 9 + 7 + 5 + 5) / 7
Mean = 60 / 7
Mean ≈ 8.6 (rounded to one decimal place)
So, the mean travel time for the 7 students is approximately 8.6 minutes.
To find the median travel time, we need to arrange the travel times in order from smallest to largest:
5, 5, 7, 8, 9, 12, 14
There are 7 students, so the median is the middle value. In this case, the middle value is the average of the 4th and 5th numbers:
Median = (8 + 9) / 2
Median = 8.5
So, the median travel time for the 7 students is 8.5 minutes.
To learn more about mean please click on below link
https://brainly.com/question/28060453
#SPJ1
Please help with give brainiliest to whoever gets it right.
Answers
For the given Cuboid, the width will be equal to 4.5 cm.
What exactly is a cuboid?
A cuboid is a three-dimensional solid shape that has six rectangular faces, where opposite faces are equal in size and shape. A cuboid is also known as a rectangular parallelepiped or rectangular prism.
In a cuboid, the three pairs of opposite faces are parallel to each other and perpendicular to the other pair of faces. The cuboid has eight vertices or corners, twelve edges, and six rectangular faces.
Now,
We can use the formula for the volume of a cuboid to find the missing dimension:
Volume = Length x Width x Height
In this case, we are given the length and height of the cuboid, but we do not know its width. Let's assume that the width of the cuboid is "w". Then, we can write the equation:
220.5 = 7 x w x 7
Simplifying this equation, we get:
220.5 = 49w
Dividing both sides by 49, we get:
w = 4.5
Therefore, the third dimension of the cuboid is:
Width = 4.5 cm
So, the cuboid has three dimensions of 7 x 4.5 x 7 cm.
To know more about cuboid visit the link
brainly.com/question/29424737
#SPJ1
Which point is a vertex of the hyperbola?
O (1,-15)
O (1,-2)
O (1,3)
O (1,11)
Answers
Option C. is correct one, (1, 3) is a vertex (out of two) of the hyperbola.
Define the vertex of hyperbola?In a hyperbola, the vertex refers to the point where the transverse axis intersects the hyperbola. The transverse axis is the axis that passes through the two vertices of the hyperbola, and it is perpendicular to the imaginary axis that separates the two branches of the hyperbola.
There are two vertices in a hyperbola, one on each side of the imaginary axis. The distance from each vertex to the center of the hyperbola is equal to the value of the constant.
The question specifies that the dot on the hyperbola denotes the vertices in both graph,
They are (1,3) and (1,- 7)
However, (1,3) is on the given option of possible answers, while (1,-7) is not,
Thus , (1,3) is a vertex (out of two) of the hyperbola.
To know more about hyperbola, visit:
https://brainly.com/question/3351710
#SPJ1
What is the effect of the rule of 78s when a borrower repays an add-on method loan early? please help
Answers
The effect of the Rule of 78s when a borrower repays an add-on method loan early may result in higher interest charges and potential prepayment penalties due to the uneven allocation of interest throughout the loan term.
The Rule of 78s is a method used by some lenders to allocate interest charges in add-on method loans, particularly for consumer loans. When a borrower repays an add-on method loan early, the Rule of 78s may affect how the prepayment is handled and the amount of interest charged.
Under the add-on method, the interest is calculated upfront based on the original loan amount and term. With the Rule of 78s, the interest is allocated to the loan payments in a manner that assigns more interest to the earlier payments in the loan term. This means that during the initial period of the loan, the borrower is primarily paying off interest rather than the principal.
When a borrower repays an add-on method loan early, the Rule of 78s may result in a higher amount of interest being charged compared to a simple interest loan. As the early payments have been disproportionately allocated more interest, the borrower may have paid off less of the principal than they would have under a simple interest method. Consequently, the borrower may face a higher prepayment penalty as they have not paid as much towards the principal balance as anticipated.
To learn more about Interest :
https://brainly.com/question/25793394
#SPJ11
The length of a rectangle is 3cm
greater than it's width. The area of the rectangle is 180cm ². Find the
length and the width.
Answers
Length= 3cm
Width=60cm
Sorry if I’m wrong but I’m pretty sure I’m accurate.
f(x)=x(x
2
+1)(x+5)(x
2
−3)
Answers
F(x) is a degree 6 polynomial having roots at x = 0, I -5, and 3.
As F(x) contains six elements in the form of (x-a), where an is a root, the degree of F(x) is 6. We discover that the roots are x=0, I -5, and 3 when we set each component to zero. By resolving each issue independently, their roots can be discovered. For instance, x=0, I is obtained from x(x2+1)=0. We obtain x=-5 from (x+5)=0. We get x=3 from (x2-3)=0. The roots of F(x) are significant because they reveal where the function crosses the x-axis and where its extrema are.
learn more about root here:
https://brainly.com/question/16932620
#SPJ11
KN is tangent to circle � O at point � K. If m � � ⌢ = 9 8 ∘ m KA ⌢ =98 ∘ , find m ∠ � � � m∠AKN.
Answers
If m � � ⌢ = 9 8 ∘ m KA ⌢ =98 ∘, By solving we finf that m∠ � � � m∠AKN = m∠KNO = 90 degrees.
What is tangent?A tangent is a straight line or plane that intersects a curve or curved surface at exactly one point, called the point of tangency.
Since KN is tangent to circle O at K, we have ∠KNO = 90 degrees.
Also, ∠KAN is an external angle to triangle AKO, so we have:
∠KAN = ∠KAO + ∠AKO
But ∠KAO is equal to ∠KNO (since both are 90 degrees), so we can rewrite the above as:
∠KAN = ∠KNO + ∠AKO
Substituting in the given values, we get:
98 = 90 + ∠AKO
Solving for ∠AKO, we get:
∠AKO = 8 degrees
Finally, since ∠AKN is an inscribed angle that intercepts arc AN, we have:
m∠AKN = 1/2 × m(arc AN)
Since arc AN is the complement of arc KO (since they add up to a full circle), we have:
m(arc AN) = 180 - m(arc KO)
m(arc KO) = m∠KNO (since both arc KO and ∠KNO intercept the same segment KN)
m∠KNO = 90 degrees (as noted above)
Therefore, we have:
m(arc AN) = 180 - m∠KNO = 180 - 90 = 90 degrees
Substituting this into the formula for m∠AKN, we get:
m∠AKN = 1/2 × m(arc AN) = 1/2 × 90 = 45 degrees
To know more about inscribed angle visit:
https://brainly.com/question/29132881
#SPJ1
The function f(x)=−(x−3)2+7 is written in vertex form and shows that the vertex of the graph of f is located at (3, 7) . Each value of the f can be obtained from two different x -values except f(x)=7 . Which best explains why f(x)=7 is the output for only one input value?
Answers
f(x) = 7 is the output for only one input value, which is x = 3, because this is the only value that results in the maximum value of the function.
What is function?In mathematics, a function is a relationship between two sets of elements, called the domain and the range, such that each element in the domain is associated with a unique element in the range.
The function f(x) = −(x−3)²+7 is a quadratic function in vertex form. The vertex form of a quadratic function is given by f(x) = a(x - h)² + k, where (h, k) is the vertex of the parabola.
In this case, the vertex is (3, 7), which means that the parabola opens downwards and has a maximum value of 7. This also means that any value of f(x) less than 7 can be obtained from two different values of x, since the parabola is symmetric around its vertex.
However, f(x) = 7 is the maximum value of the function and can only be obtained for a single value of x, which is the x-coordinate of the vertex, namely x = 3. This is because the vertex is the highest point on the parabola, and any other value of x will result in a lower value of f(x).
Therefore, f(x) = 7 is the output for only one input value, which is x = 3, because this is the only value that results in the maximum value of the function.
To learn more about functions from the given link:
https://brainly.com/question/12431044
#SPJ1
RSM WORK HELLLPPP
|x-7|=x-7
solve the equation
PLEASE HELP
Answers
Answer: x≥7
Step-by-step explanation:
in a hypothetical study, 200 patients with breast cancer were treated by surgery and another 200 patients with breast cancer were treated by radiation therapy. the treatment methods were randomly assigned. all patients were followed for 2 years, and the mortality rates between the two groups of patients were compared at the end of the follow-up. this study is a(n)
Answers
RCTs are considered one of the gold standards for evaluating the effectiveness of medical interventions because they can provide strong evidence of causality.
What type of study design was used in a hypothetical study ?The study described in the question is a randomized controlled trial (RCT). An RCT is a type of experimental study where participants are randomly assigned to different groups, and the effect of an intervention is evaluated by comparing outcomes between the groups. In this case, the intervention is the type of treatment (surgery vs radiation therapy), and the outcome of interest is the mortality rate after 2 years.
Random assignment of patients to treatment groups helps to reduce the influence of confounding variables and biases, thus allowing a more accurate assessment of the intervention's effects. In addition, by following patients over a specific period of time, the study can provide information about the long-term effects of the treatment.
Overall, RCTs are considered one of the gold standards for evaluating the effectiveness of medical interventions because they can provide strong evidence of causality.
Learn more about Hypothetical study
brainly.com/question/31068191
#SPJ11
Tony, Sayo and Adah each played a game. Tony's score was four times Sayo's score. Adah's score was half of Tony's score. Write down the ratio of Tony's score to Sayo's score to Adah's score. Give your answer in its simplest form.
Answers
According to the solution we have come to find that, the ratio of Tony's score to Sayo's score to Adah's score is 4 : 1 : 2.
What is the simplest form?The smallest equivalent fraction of the integer is the most basic form.
Therefore, the ratio of Tony's score to Sayo's score to Adah's score can be written as:
4S : S : 2S
Simplifying this ratio by dividing each term by the greatest common factor (which is S), we get:
4 : 1 : 2
Therefore, the ratio of Tony's score to Sayo's score to Adah's score is 4 : 1 : 2.
To know more about ratio visit,
https://brainly.com/question/26392557
#SPJ9
the following statements is NOT true for the parabola se
ph?
is of symmetry is x-1.
ertex is (1,-3).
"coefficient is positive.
rabola has two positive
Answers
Answer:
The statement "parabola has two positive x-intercepts" is not true for the parabola described.
Hope This Helps!
PLEASE HELP MEEE!!!
What is the value of X
What is the value of ARC MP
Answers
Answer:
x = 19, ARC MP = 104º
Step-by-step explanation:
9x-43 = 5x+33
4x = 76
x = 19
Arc MP = 360 - (9x-43 + 5x+33)
Arc MP = 360 - (9(19)-43 + 5(19)+33)
= 360 - 256
MP = 104º
What is the volume
of a pyramid with
sides of 22 inches and
30 inches, and a
of height of 15 inches?
Answers
Answer: 3300
Explanation: V=lwh/3=22x30x15/3=3300
For the following problem write the simplest polynomial function with the given zeros: 2,
-1, and -8
Answers
Answer:
f(x) =x^2 - 3x^2 - 6x + 8.
Step-by-step explanation:
needed help w this math
Answers
Answer:
Step-by-step explanation:
well you dont get an answer
a researcher in campaign finance law wants to estimate the proportion of elementary, middle, and high school teachers who contributed to a candidate during a recent election cycle. given that no prior estimate of the population proportion is available, what is the minimum sample size such that the margin of error is no more than 0.04 for a 99% confidence interval?
Answers
Approximately, the minimum sample size required is n = 600.
What is the minimum sample size required to estimate the proportion?A researcher in campaign finance law wants to estimate the proportion of elementary, middle, and high school teachers who contributed to a candidate during a recent election cycle. Given that no prior estimate of the population proportion is available, the minimum sample size such that the margin of error is no more than 0.04 for a 99% confidence interval is 600.
How to determine the minimum sample size?We use the following formula : n = (Zα/2)^2 × p × q ÷ E^2where,α = 1 - 0.99 = 0.01Zα/2 = Z0.005 from the standard normal distribution table Zα/2 = 2.58 (approx.)p = 0.5, as we don't have any prior information regarding the population proportion. q = 1 - p = 1 - 0.5 = 0.5E = 0.04Substitute the values in the formula to get: n = (2.58)^2 × 0.5 × 0.5 ÷ (0.04)^2n = 661.56.
Approximately, the minimum sample size required is n = 600.
Learn more about Sample Size.
brainly.com/question/30885988
#SPJ11
A bell tolls every 30 mins on the hour and at half past the hour. How many times does the bell toll between 11.45am and 3.10pm?
Answers
The bell tolls 6 times between 11:45 AM and 3:10 PM
To find out how many times the bell tolls between 11:45 AM and 3:10 PM, follow these steps:
1. Identify the first bell toll after 11:45 AM:
The first bell toll occurs at 12:00 PM (noon) since it is the next half hour after 11:45 AM.
2. Identify the last bell toll before 3:10 PM:
The last bell toll occurs at 3:00 PM since it is the last half hour before 3:10 PM.
3. Calculate the total time between the first and last bell tolls:
From 12:00 PM to 3:00 PM, there are 3 hours.
4. Determine the number of bell tolls in each hour:
Since the bell tolls every 30 minutes, it tolls 2 times per hour (on the hour and at half past the hour).
5. Calculate the total number of bell tolls:
For 3 hours, the bell tolls 3 hours x 2 tolls per hour = 6 tolls.
For similar question on times.
https://brainly.com/question/27524409
#SPJ11
if you are on a 2,000 calorie diet per day, and you are aiming for 20% to come from fat/lipids, how many grams of fat would you try to consume?
Answers
You should try to consume approximately 44.44 grams of fat per day.
To calculate how many grams of fat you should consume on a 2,000 calorie diet with 20% of calories coming from fat,
follow these steps:
Determine the total calories from fat:
20% of 2,000 calories = 0.20 x 2,000 = 400 calories from fat.
Convert calories to grams:
There are 9 calories in 1 gram of fat. To find out how many grams of fat you should
consume, divide the calories from fat by the calories per gram:
400 calories / 9 calories/gram = 44.44 grams of fat.
So, if you are on a 2,000 calorie diet and aiming for 20% of your calories to come from fat, you should try to consume
approximately 44.44 grams of fat per day.
for such more question on grams
https://brainly.com/question/13439286
#SPJ11
Write the equation of a line perpendicular to y= - 2/3x -1 that goes through (6,2)
Answers
Answer: y = (3/2)x - 7
Step-by-step explanation:To find the equation of a line perpendicular to another line, we need to know that the slopes of two perpendicular lines are negative reciprocals of each other. Therefore, the slope of the line we're looking for will be the negative reciprocal of -2/3, which is 3/2.
Now we can use the point-slope form of the equation of a line, which is y - y1 = m(x - x1), where (x1, y1) is a point on the line and m is the slope.
We know that the line we're looking for goes through the point (6,2), so x1 = 6 and y1 = 2. We also know that the slope is 3/2. Substituting these values into the point-slope form, we get:
y - 2 = (3/2)(x - 6)
Simplifying and putting the equation into slope-intercept form, we get:
y = (3/2)x - 7
So the equation of the line perpendicular to y = -2/3x -1 that goes through the point (6,2) is y = (3/2)x - 7.
plssss I will fail the whole course I beg u
A function is shown in the table. x g(x) −3 17 −1 −3 0 −4 2 13 Which of the following is a true statement for this function? (5 points) The function is increasing from x = −3 to x = −1. The function is increasing from x = −1 to x = 0. The function is decreasing from x = 0 to x = 2. The function is decreasing from x = −3 to x = −1.
Answers
Answer:
Step-by-step explanation:
let $a 1a 2a 3a 4$ be a square, and let $a 5,a 6,a 7,\ldots,a {34}$ be distinct points inside the square. non-intersecting segments $\overline{a ia j}$ are drawn for various pairs $(i,j)$ with $1\le i,j\le 34$, such that the square is dissected into triangles. assume each $a i$ is an endpoint of at least one of the drawn segments. how many triangles are formed?
Answers
There are 56,148 triangles that can be formed by drawing non-intersecting segments among the 34 points in the square.
To form a triangle, we need to choose three points among the 34 points in the square. There are 34C3 = 5984 ways to do this.
However, not all combinations of three points will form a triangle. A triangle can only be formed if its vertices are connected by line segments. There are 34 line segments that connect each of the 34 interior points to one of the four vertices of the square, for a total of 4x34=136 line segments.
Thus, each of the 5984 combinations of three points can form a triangle if and only if the three points are connected by at least one of the 136 line segments. We can use the inclusion-exclusion principle to count the number of triangles that can be formed.
Let A_i denote the set of combinations of three points that include the ith interior point, and let B_j denote the set of combinations of three points that include the jth line segment. Then, the number of triangles that can be formed is
|A_1 ∪ A_2 ∪ A_3 ∪ A_4 ∪ B_1 ∪ B_2 ∪ ... ∪ B_136|,
where |S| denotes the cardinality of set S.
By the inclusion-exclusion principle, this is:
|A_1| + |A_2| + |A_3| + |A_4| + |B_1| + |B_2| + ... + |B_136|
|A_1 ∩ A_2| - |A_1 ∩ A_3| - ... - |A_3 ∩ A_4| - |B_1 ∩ B_2| - ... - |B_135 ∩ B_136|
|A_1 ∩ A_2 ∩ A_3| + |A_1 ∩ A_2 ∩ A_4| + ... + |A_2 ∩ A_3 ∩ A_4| + ... + |B_1 ∩ B_2 ∩ B_3| + ... + |B_134 ∩ B_135 ∩ B_136|
|A_1 ∩ A_2 ∩ A_3 ∩ A_4| - ... - |B_1 ∩ B_2 ∩ ... ∩ B_136|.
To compute each of these cardinalities, we use the fact that each interior point is connected to at least one other point, so |A_i| ≥ 33 and each line segment is an endpoint of at least one drawn segment, so |B_j| ≥ 1.
Also, note that |A_i ∩ A_j| = 32C1 = 32 since there are 32 other points that could be chosen to form a triangle with i and j, and |B_i ∩ B_j| = 0 since two line segments cannot intersect inside the square.
Using similar reasoning, we can compute each of the remaining cardinalities. After doing so, we obtain:
33 x 34C2 + 136 x 33 - 32C2 x 6 - 32C2 x 3 + 32C3 x 4
= 56148.
Learn more about inclusion-exclusion principle here
brainly.com/question/27975057
#SPJ4
The given question is incomplete, the complete question is:
let a_1,a_2, a_3, a_4 be a square, and let a_5,a_6,a_7 .......a_34 be distinct points inside the square. non-intersecting segments a_i,a_j are drawn for various pairs (i,j) with 1<=i,j<= 34 such that the square is dissected into triangles. assume each a_i is an endpoint of at least one of the drawn segments. how many triangles are formed?
if we didn't know the proportion of students that expect to drop the class, and we wanted to estimate a 95% ci with a margin of error of 3%. then the sample size needed would be?
Answers
The required sample size is approximately 1068 students to estimate a 95% confidence interval with a margin of error of 3%
The estimate a 95% confidence interval with a margin of error of 3%, we need to determine the required sample size. We can do this using the following steps:
1. Identify the confidence level and margin of error: In this case, we want a 95% confidence interval, which corresponds to a z-score of 1.96 (found in a standard normal distribution table). The margin of error is 3% or 0.03.
2. Determine the maximum variance: Since we don't know the true proportion (p) of students expecting to drop the class, we need to assume the maximum variance, which occurs when p = 0.5. This will give us a conservative estimate for the required sample size.
3. Calculate the sample size:
Using the formula n =[tex](Z^2 * p * (1-p)) / E^2[/tex], where n is the sample size, Z is the z-score (1.96), p is the proportion (0.5), and E is the margin of error (0.03).
n =[tex] (1.96^2 * 0.5 * 0.5) / 0.03^2[/tex]
n ≈ [tex]1067.1[/tex]
4. Round up the sample size: Since we cannot have a fraction of a student, we round up the sample size to the nearest whole number.
for such more questions on sample size
https://brainly.com/question/28583871
#SPJ11
in a study, 40% of adults questioned reported that their health was excellent. a researcher wishes to study thehealth of people living close to a nuclear power plant. among 13 adults randomly selected from this area, only3 reported that their health was excellent. find the probability that when 13 adults are randomly selected, 3 orfewer are in excellent health.a) 0.112 b) 0.169
Answers
If 40% of adults questioned reported that their health was excellent, then the probability that when 13 adults are randomly selected, 3 or fewer are in excellent-health is (b) 0.169.
The number of adults randomly selected is = 13 adults,
We need to find probability of getting 3 or fewer people reporting excellent health which is considered as success , in 13 trials
The probability of success = 0.4 ...because proportion of adults reporting excellent health in general population.
We use "binomial-probability" formula to calculate probability:
⇒ P(X ≤ 3) = ΣP(X = k), for k = 0, 1, 2, 3
where X = number of successes = people reporting excellent health and P(X = k) = probability of getting exactly k successes;
⇒ P(X = k) = C(n,k) × p^k × (1-p)^(n-k),
where n = number of trials, p = probability of success, and
substituting values,
We get,
⇒ P(X ≤ 3) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3),
⇒ C(13,0) × (0.4)⁰ × (0.6)¹³ + C(13,1) × (0.4)¹ × (0.6)¹² + C(13,2) × (0.4)² × (0.6)¹¹ + C(13,3) × (0.4)³ × (0.6)¹⁰,
≈ 0.1686 ≈ 0.169.
Therefore, the required probability is approximately 0.169, the correct option is (b).
Learn more about Probability here
https://brainly.com/question/14214595
#SPJ4
Can someone PLEASE help me with this ASAP? it’s due today!! Do part A, B, and C. I will give brainliest!!
100 points and brainliest!!
Answers
The experimental probability for the numbers are:
P(3) = 1/12 (in fraction)
P(3) = 0.08 (in decimal)
P(3) ≈ 8% (in percentage)
P(6) = 3/12
P(6) = 0.25
P(6) = 25%
P(less than 4) = 6/12
P(less than 4) = 0.5
P(less than 4) = 50%
How to find the experimental probability?Probability is the likelihood of a desired event happening.
Experimental probability is a probability that relies mainly on a series of experiments.
Blake rolled a die 12 times and 3 appears once (Given in the table). The experimental probability for 3 will be:
P(3) = 1/12 (in fraction)
P(3) = 0.08 (in decimal)
P(3) ≈ 8% (in percentage)
Blake rolled a die 12 times and 6 appears 3 times (Given in the table). The experimental probability for 6 will be:
P(6) = 3/12
P(6) = 0.25
P(6) = 25%
The numbers less than are 1, 2 and 3. Six of the twelve outcome in the table are less than 4.
P(less than 4) = 6/12
P(less than 4) = 0.5
P(less than 4) = 50%
Learn more about probability on:
brainly.com/question/251701
#SPJ1
Given: ABC is a right triangle with right angle C. AC=15 centimeters and m∠A=40∘.
What is BC ?
Answers
To find the length of side BC, we'll use right-triangle trigonometry as follows:
The value of the tangent function for the measure of angle A = (the length of the side opposite angle A)/(the length of the side adjacent to angle A)
tan 40° = BC/AC
tan 40° = BC/15 cm
Now, multiply both sides by 15 cm:
(tan 40°)(15 cm) = (BC/15 cm)(15 cm)
(tan 40°)(15 cm) = (BC)(15 cm/15 cm)
(tan 40°)(15 cm) = (BC)(1)
BC = (tan 40°)(15 cm)
Now, using a table of values for the trigonometric functions for angles from 0° to 90° or using a scientific calculator, we find that tan 40° = .8391 (to 4 decimal places). Now, substituting on the right side we get:
BC = (.8391)(15 cm)
BC = 12.6 cm to the nearest tenth of a centimeter.