There is a .90 probability that the project will be completed before approximately day 118.
The given information can be solved by using the formula of z-score as follows:
Z = (X - μ)/σ
Where: Z = z-score
X = the time for project completion
μ = the mean time for the critical path
σ = standard deviation for the critical path
σ² = variance of the critical pathσ = √64
σ = 8
Given that the mean time for the critical path is μ = 108 days and σ = 8 days,
Therefore, the z-score of the completion of the project before 108 days is given by:
Z = (X - μ)/σ0.90
= P(Z < z)
= P(Z < (X - 108)/8)P(Z < (X - 108)/8)
= 0.90
Using a z-table or calculator, we find the z-value to be 1.28.
Then,1.28 = (X - 108)/8
Multiplying both sides by 8, we get:10.24 = X - 108
Adding 108 to both sides, we get: X = 118.24
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I need some help please
Answer:
−18 x + 12
Step-by-step explanation:
multiply using the distributive property
Answer:
-2(9x-6)
-2 divided by 9x = - 18
-2 divided by - 6 = 12 (negative + negative =positive)
= - 18x +12
a spinner with the letters a, b, c, and d is spun. what is the theoretical probability of landing on the letter c?
The probability of the spinner landing on the letter C is 1/4
To understand the probability of the spinner landing on the letter C, we need to start by looking at the total number of possible outcomes. In this case, there are four possible outcomes, corresponding to the four letters A, B, C, and D.
Since each of the four quadrants on the spinner is equal in size, each of the four letters has an equal chance of being landed on. Therefore, the probability of the spinner landing on the letter C is the number of ways that the spinner can land on C, divided by the total number of possible outcomes.
Since there is only one way for the spinner to land on C, and there are four possible outcomes in total, the probability of the spinner landing on the letter C is 1/4
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The given question is incomplete, the complete question is:
A spinner with four equal quadrants labeled A, B, C, and D is spun. What is the theoretical probability of the spinner landing on the letter C
Which statement describes the graph of this polynomial function?
f (x) = x Superscript 5 Baseline minus 6 x Superscript 4 Baseline + 9 x cubed
Answer:
The statement that describes the graph of the polynomial function f (x) = x^5 - 6x^4 + 9x^3 is that it has a local maximum at x = 0 and a local minimum at x = 2. The degree of the polynomial is 5, which means it has five zeros or x-intercepts. The leading coefficient is positive, which indicates that the graph will rise to the left and right. The function has a point of inflection at x = 1.5, where the concavity changes from up to down. Overall, the graph of this polynomial function has a typical "upside-down U" shape with local extrema and a point of inflection.
The product of two positive consecutive integers is 2 less than
twice their sum. Find the integers.
The two positive consecutive integers as required to be determined are; 3 and 4.
What are the integers which are as described?It follows from the task content that;
Let the positive consecutive Integers be; x and (x + 1).
Therefore, we have that;
x (x + 1) = 2 (x + x + 1) - 2
x² + x = 4x + 2 - 2
x² - 3x = 0
x = 0 or x = 3.
Since the integers are positive, Therefore, the integers in discuss are 3 and 4.
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1. How long does pia's journey take?
2. How much longer does Sam spend driving then Pia?
a) Pea's journey takes 2.25 hours.
b) Sam spends 0.25 hours longer driving than Pea.
a. To find Pea's journey time, we use the formula:
time = distance / speed
Substituting the values given, we get:
time = 180 km / 80 km/h
time = 2.25 hours
b. To find how much longer Sam spends driving than Pea, we can subtract the journey times.
time taken by Sam = distance / speed = 200 km / 80 km/h = 2.5 hours
Time difference = Sam's journey time - Pea's journey time = 2.5 hours - 2.25 hours = 0.25 hours
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a container of hot liquid is placed in a freezer that is kept at a constant temperature of 25f. the initial temperature' of the liquid is 170f. after 4 minutes, the liquid's temperature is 70f. how much additional time (after 4 minutes) will it take for its temperature to decrease to 35f? round your answer to two decimal places.
The additional time it will take for the temperature of the liquid to decrease to 35°F after 4 minutes is 21.54 minutes (rounded to two decimal places).
Given that: Initial temperature of the liquid, T₁ = 170°F.Final temperature of the liquid, T₂ = 35°F.Constant temperature of the freezer, T = 25°F.
Time taken to decrease the temperature of the liquid from 170°F to 70°F, t₁ = 4 minutes.
The rate of change of temperature, R = (T₁ - T) / t₁ = (170°F - 25°F) / 4 minutes = 111.25°F/minute.
In the freezer, the rate of change of temperature is constant. Hence, the rate of change of temperature after 4 minutes can be used to calculate the additional time it will take for the liquid's temperature to decrease from 70°F to 35°F:R = (T₂ - T) / t₂ = (35°F - 25°F) / t₂t₂ = (10°F / R) = (10°F / 111.25°F/minute) = 0.089728 minutes ≈ 5.38 seconds.
Adding this time to the initial 4 minutes, we have the additional time it will take for the temperature of the liquid to decrease to 35°F after 4 minutes: t = t₁ + t₂ = 4 minutes + 0.089728 minutes ≈ 4.089728 minutes or 4 minutes 5.38 seconds.
The additional time it will take for the temperature of the liquid to decrease to 35°F after 4 minutes is 21.54 minutes (rounded to two decimal places).
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the temperature at 12 noon was 10 degree Celsius above zero .if it decreases at the rate of 2 degree Celsius per hour until midnight ,at what time would the temperature be 8 degree Celsius below zero? what would be the temperature at midnight?
Answer:
The time will be 1:00pm(13 hours) at which the degree Celsius will drop down to 8degrees Celsius since the temperature at 12noon was 10 degree Celsius and it is dropping at the rate of 2 degree Celsius.
What is the area of this parallelogram?
O A = 20 ft²
O A=213ft²
O A = 33 ft²
O A=41 ft²
5 ft
4 ft
81 ft
The area of the given parallelogram is A- 33(1/2) ft² using the base and height of the parallelogram. the correct answer is (c).
What is a parallelogram?A quadrilateral with two sets of analogous edges is appertained to as a parallelogram. In a parallelogram, the opposing edges are of equal length, and the opposing angles are of equal size. also, the internal angles that are supplementary to the transversal on the same side. 360 ° is the sum of all internal angles. A parallelepiped is a three- dimensional shape with parallelogram- shaped sides. The base( one of the analogous lines) and height( the distance from top to bottom) of the parallelogram determine its area. A parallelogram's border is determined by the lengths of its four edges. The characteristics of a parallelogram are participated by the shapes of a square and cell. What's area? The size of a section on a face is determined by its area. face area refers to the area of an open face or the border of a three- dimensional object, whereas the area of an area area plane region or area area plane area refers to the area of a shape or planar lamella.
The area of a parallelogram is given by
[tex]base*height.base=8(1/3)ft[/tex]
height=4ft
[tex]Area=b*h =(25/3)*4 =100/3 = 33[/tex]
[tex][base]\frac{1}{3}[(hieght)] ft^{2}[/tex]
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ten identical protein samples were analyzed by the bradford method for protein analysis. the following values for protein concentration were obtained. observation number protein concentration (mg/ml) 1 1.02 2 0.98 3 0.99 4 1.01 5 1.03 6 0.97 7 1.00 8 0.98 9 1.03 10 1.01 calculate sample mean
The sample mean protein concentration obtained using the Bradford method for protein analysis is 1.00 mg/ml.
We must add together all the protein concentrations and divide the total by the number of observations in order to determine the sample mean for the protein concentrations acquired using the Bradford technique for protein analysis.
We have ten identical protein samples in this instance, and the measured protein concentrations are as follows:
Protein concentration (mg/ml) observations: 1: 1.02, 2: 0.98, 3: 0.99, 5: 1.01, 6: 0.97, 8: 1.00, 9: 1.03, and 10: 1.01.
We add up the protein concentrations and divide the total by the number of observations to determine the sample mean:
[tex](1.02 + 0.98 + 0.99 + 1.01 + 1.03 + 0.97 + 1.00 + 0.98 + 1.03 + 1.01) / 10[/tex] is the sample mean.
= 1.00 mg/ml
As a result, the Bradford method for protein analysis yielded a sample mean protein content of 1.00 mg/ml.
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A sphere has radius 2. 7cm. What is its surface area to the nearest sqaure cenitmeter
[tex]\textit{surface area of a sphere}\\\\ SA=4\pi r^2 ~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ r=2.7 \end{cases}\implies SA=4\pi (2.7)^2\implies SA\approx 91.61~cm^2[/tex]
3.1.1) Determine the Accumulated amount for the investment at CAPITEC.
3.1.2) Determine the Accumulated amount for the investment at FNB.
3.1.3) Use the information you worked out to help Lebo decide which bank will give her the better investment. Explain your answer.
1. The accumulated amount for the investment at CAPITEC is R36,750.
2. The accumulated amount for the investment at FNB is R33,480.
3. Lebo will earn more interest if she invests her money at Capitec than at FNB.
What is the Accumulated amount for the investment at CAPITEC?The accumulated amount for the investment at Capitec with a principal amount of R30,000 invested at a simple interest rate of 7.5% for 3 years can be calculated as follows:
[tex]= Principal + (Principal * Rate * Time)\\= R30,000 + (R30,000 * 0.075 * 3)\\= R30,000 + R6,750\\= R36,750[/tex]
What is the Accumulated amount for the investment at FNB?The accumulated amount for the investment at FNB with a principal amount of R30,000 invested at a compound interest rate of 3.5% per annum for 3 years can be calculated using the compound interest formula:
[tex]= Principal * (1 + Rate)^Time\\= R30,000 * (1 + 0.035)^3\\= R30,000 * 1.116\\= R33,480[/tex]
Now, based on the calculations, the investment at Capitec will yield R36,750 after 3 years while the investment at FNB will yield R33,480 after 3 years. Therefore, Lebo will earn more interest if she invests her money at Capitec than at FNB.
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suppose that the value of a stock varies each day from $8.82 to $16.17 with a uniform distribution. find the third quartile, i.e., 75% of all days the stock is below what value?
The third quartile is $10.6575, which means that 75% of all days the stock is below this value.
The range of the stock price is from $8.82 to $16.17, and the distribution is uniform, which means that the probability of the stock price being any value between the minimum and maximum is the same.
To find the third quartile, we need to find the value x such that 75% of the observations are less than or equal to x, and 25% of the observations are greater than or equal to x.
Since the distribution is uniform, we can find x by finding the value that separates the bottom 25% of the distribution from the top 75% of the distribution.
The bottom 25% of the distribution spans from $8.82 to some value x. Since the distribution is uniform, we can find x by setting the probability of the stock price being less than or equal to x to 0.25, which gives:
(x - 8.82) / (16.17 - 8.82) = 0.25
Solving for x, we get:
x - 8.82 = 0.25 * (16.17 - 8.82)
x - 8.82 = 1.8375
x = 10.6575
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At 4 p.m. Jack, who is 6 feet tall, casts a shadow 4 feet long. At the same time, a nearby tree casts a shadow 12 feet long.
What is the height (x) of the tree?
Therefore [tex]x/6=12/4[/tex].[tex]5x=16ft[/tex]The height of the tree will be 16ft.the correct answer is (c).
What is trigonometry?The study of the correlation between a right-angled triangle's sides and angles is the focus of one of the most significant areas of mathematics in history: trigonometry. Hipparchus, a Greek scholar, introduced this idea. In this article, we will study the fundamentals of trigonometry, including its formulas, tables, ratios, functions, and many solved examples. What are similar triangles If the respective sides of two triangles are proportional and the corresponding angles are congruent, then the triangles are said to be similar. To put it another way, similar triangles have the same shape but may differ in height. In addition, if the matching sides of the triangles are equal in length, the triangles are congruent. In the given figures, these are two similar triangles as the form the same angle with the ground The height of the tree will be 16ft using the property of similar triangles.
by the question.
Let's first find the ratio of Jack's height to his shadow length:
Jack's height / Jack's shadow length = 6 / 4
Simplifying this ratio, we get:
[tex]Jack's height / 4 = 3 / 2[/tex]
Multiplying both sides by 4, we get:
[tex]Jack's height = 6[/tex]
Now, let's find the ratio of the tree's height to its shadow length:
Tree's height / Tree's shadow length = x / 12
Since the two triangles are similar, we know that these ratios are equal. So, we can write:
Jack's height / Jack's shadow length = Tree's height / Tree's shadow length
Substituting the known values, we get:
[tex]6/4=x/12[/tex]
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Which of these investments would be considered high-risk?
Stocks
Pension Plans
Certificate of Deposit
Annuities
Answer: Stocks
Step-by-step explanation: People mainly live on wim's so stocks at times can be unpredictable.
1. Two congruent solids 1 and 2 have the property that 1 ∩ 2 is a right
triangular prism with height√3 and a base that is an equilateral triangle of
side length 2. If the volume of 1 ∪ 2 is 25 units
3
, find the volume of 1.
The volume of solid 1 is 14 cubic units calculated through the formula of volume.
What is volume?Volume is the maximum quantity of space that an object can contain. Volume, which is essentially a measurement of an object's size, is the quantity of space a thing occupies. A three-dimensional object's volume, which is calculated in cubic units, is the quantity of space it takes up. For instance, glass has a cylindrical form and can hold a certain volume of water.
Let V1 and V2 be the volumes of the congruent solids 1 and 2, respectively. The volume of their union is given
V1 U V2 = V1+V2-V1∩V2
We know that V1 ∩ V2 is a right triangular prism with height √3 and a base that is an equilateral triangle of side length 2. So, the volume can be calculated with the following formula:
V1 ∩ V2 = (1/2) * base * height * heightbase
where base is the area of the equilateral triangle, which is √3, height is √3, and height base is 2. Plugging in these values, we get:
V1 ∩ V2 = (1/2) * √3 * √3 * 2 = 3
Now we can use the given information to find the volume of 1:
25 = V1 + V2 - V1 ∩ V2
25 = V1 + V2 - 3
We also know that V1 = V2, since the solids are congruent.
Substituting the following value with the above equation, we get:
25 = 2V1 - 3
28 = 2V1
V1 = 14
Therefore, the volume of solid 1 is 14 cubic units.
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let p value of our hypothesis testing problem is 0.10 with significance level of 0.05. what is the probability that null hypothesis is true?
Probability of the null hypothesis being true is greater than the significance level.
The probability that the null hypothesis is true depends on the significance level set before the hypothesis test. In this case, the significance level was set at 0.05 and the p-value obtained was 0.10. This means that the probability of the null hypothesis being true is greater than the significance level (0.10 > 0.05), so the null hypothesis cannot be rejected.
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when we make inferences about one population proportion, what assumptions do we need to make? mark all that apply.
The data should come from a binomial distribution. There should be no non-response or other forms of bias. The sample size should not be more than 10% of the population size, and the sample should be independent of one another.
When making inferences about one population proportion, the following assumptions need to be made:
Option 1: The sample is a simple random sample from the population.
Option 2: The sample size should be large enough so that both np ≥ 10 and n(1 − p) ≥ 10.
Option 3: The data comes from a binomial distribution.
Option 4: There is no non-response or other forms of bias.
Option 5: The sample size is no more than 10% of the population size.
Option 6: The sample is independent of one another.In order to make inferences about one population proportion, the assumptions mentioned above need to be made. It is vital to make sure that the sample is a simple random sample from the population, and that the sample size is large enough so that both np ≥ 10 and n(1 − p) ≥ 10.
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which statistical method could a scientist use to estimate the strength of evidence that a particular node in a phylogeny exists?
A scientist can use bootstrap analysis to estimate the strength of evidence that a particular node in a phylogeny exists.
Bootstrap analysis is a statistical method used to determine the reliability and robustness of phylogenetic trees' topologies. In bootstrap analysis, a series of random resampling with replacement is used to assess how well the observed data fit the phylogenetic hypothesis.
Bootstrap values range from 0 to 100 and reflect the proportion of times that a particular node or branch occurs in the bootstrap replicate trees. Bootstrap values greater than 70% are usually considered strong evidence that a particular node or branch exists in the phylogenetic tree.
Bootstrap analysis is an important tool for understanding the reliability of phylogenetic trees and the evolutionary relationships among organisms.
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Consider the expression 2(3n + 6z)
Enter an expression that shows the sum of exactly two terms that is equivalent to 2(3n+6z)
Answer:
6n+12z
Step-by-step explanation:
then we got this bc we do like terms so 6n from 2 x3n then 12z bc 2x6
Help help help help help help help help
Answer:
(5^3)^(-2)
Step-by-step explanation:
5^2 × 5^-8 = 5^-6
(5^3)^(-2) = 5^-6
a small cube with side length 6y is placed inside a larger cube with side length . what is the difference in the volume of the cubes?
The difference in the volume of a small cube with a side length 6y is placed inside a larger cube with a side length is 5616y³
To find: the difference in the volume of the cubes.
Let the length of the larger cube be x.
So, the volume of the smaller cube is (6y)³ and the volume of the larger cube is x³.
As the smaller cube is placed inside the larger cube, it means that its side length is equal to the side length of the smaller cube plus twice the side length of the smaller cube.
So, x = 6y + 2(6y) = 18y.
The volume of the smaller cube = (6y)³ = 216y³
The volume of the larger cube = x³ = (18y)³ = 5832y³.
So, the difference in volume
= Volume of the larger cube - Volume of the smaller cube
= 5832y³ - 216y³
= 5616y³.
Therefore, the difference in the volume of the cubes is 5616y³.
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Which of the series in exercises 17–56 converge, and which diverge? use any method, and give reasons for your answers
The given series diverges to negative infinity as the terms cancel out, leaving only two terms at the beginning and end of the series.
To determine the convergence of the given series, we can use the telescoping series method.
Let's write out a few terms of the series to see if we can spot a pattern:
n=1: 1/2 - 3/4 = -1/4
n=2: 2/3 - 4/5 = -2/15
n=3: 3/4 - 5/6 = -1/8
n=4: 4/5 - 6/7 = -2/35
...
We can see that the terms of the series cancel out, leaving only two terms at the beginning and end of the series. Therefore, we can write the series as:
∑ (n/n+1 - n+2/n+3) = 1/2 - (n+2)/(n+3)
As n approaches infinity, the second term approaches 1, so the series diverges to negative infinity.
Therefore, the given series diverges.
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_____The given question is incomplete, the complete question is given below:
Which of the series in exercises 17–56 converge, and which diverge? use any method, and give reasons for your answers
(∑ ∞ to n = 1) = (n/n+1 - n+2/n+3)
4) Tom has ran 10 miles of a 75 mile running challenge. If he runs 4 miles each day until he finishes the challenge, write an equation that can be used to find the number of days, d, it will take Tom to finish running the challenge miles.
Step-by-step explanation:
Let's use d to represent the number of days it will take Tom to finish the challenge miles.
Since Tom is currently 10 miles into the challenge and plans to run 4 miles each day until he finishes, the total number of miles he will run is 75 - 10 = 65 miles.
If he runs 4 miles each day, we can use the equation:
total distance = distance per day * number of days
to find the number of days it will take Tom to run 65 miles. Plugging in the known values, we get:
65 = 4d
Simplifying this equation, we can solve for d:
d = 65/4
So, it will take Tom d = 16.25 days to finish the running challenge if he runs 4 miles each day. However, since he cannot run a fraction of a day, we can round up the answer to the nearest whole number of days. Therefore, it will take Tom 17 days to finish the challenge.
The equation that can be used to find the number of days, d, it will take Tom to finish running the challenge miles is:
d = ceil(65/4)
where ceil is the ceiling function, which rounds up the result to the nearest whole number.
Answer:
16 days + 1 mile
Step-by-step explanation:
please help me
ill give brainlyist
The constant of proportionality is calculated as:
Option D: 8.5
How to find the constant of proportionality?The constant of proportionality is defined as the constant value of the ratio between two proportional quantities.
Now, we are given a table of values and as such, we can find the constant of proportionality from the formula:
k = y/x
From the table, we have:
k = 25.50/3
k = 8.5
k = 42.5/5
k = 8.5
k = 59.50/7
k = 8.5
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Select the correct answer.
A graph with a y-axis and an x-axis in positive and negative planes. Two lines L I and I J are formed by connecting points (Negative 4,3), (5,3), and (5, Negative 3).
I(5, 3), J(5, -3), and L(-4, 3) are three vertices of rectangle IJKL. What are the coordinates of the fourth vertex, K, of rectangle IJKL?
A.
(-4, -3)
B.
(5, 3)
C.
(5, -3)
D.
(-4, 3)
The cοοrdinates οf the fοurth vertex K must be the reflectiοn οf the pοint L(-4,3) acrοss the οrigin, which is (4,-3).
Thus, οptiοn D is cοrrect.
What is the cοοrdinate geοmetry?Cοοrdinate geοmetry is a branch οf mathematics that deals with the study οf geοmetry using the principles οf algebra.
The rectangle IJKL is fοrmed by cοnnecting the pοints I, J, K, and L in a clοckwise οr cοunterclοckwise manner. Since I and J have the same x-cοοrdinate and are οn οppοsite sides οf the x-axis, and L and K have the same y-cοοrdinate and are οn οppοsite sides οf the y-axis, it fοllοws that the diagοnals οf the rectangle IJKL intersect at the οrigin (0,0).
Therefοre, the cοοrdinates οf the fοurth vertex K must be the reflectiοn οf the pοint L(-4,3) acrοss the οrigin, which is (4,-3).
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What is the percent of decrease from 98.7 to 0?
Answer:
100% because it goes to zero which means 100% is decreased
Cydni is working with some algebra tiles at her desk. She makes groups that look like this:
A:
x + 1 + 1 + 1 + x + 1 + 1 + 1 + x + 1 + 1 + 1
B:
3x + 9
C:
3(x + 9)
D:
3(x + 3)
E:
x + 2x + 3(x + 2)
F:
x3 + 13
(Please answer quickly!!)
Answer:
B. 3x+9
hope this helped
What is the slope of the line parallel to the function: * y = 50 -0.5x 50 0.5 -0.5 02
The slope of the line parallel to the function: y = 50 - 0.5x include the following: C. -0.5.
What are parallel lines?In Mathematics and Geometry, parallel lines simply refers to two (2) lines that are always the same or equal distance apart and never meet.
Generally speaking, two (2) lines are considered as parallel under the following standard conditions:
Slope, m₁ = Slope, m₂.
From the function, we have:
y = 50 - 0.5x
Slope, m = -0.5
In this context, we can reasonably infer and logically deduce that the slope of the two lines would be equal and the same:
Slope of line 1 = Slope of line 2
-0.5 = -0.5
In conclusion, we can logically deduce that the slope of the given line is equal to -0.5.
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Since the beginning of school, Steven has been saving money to buy a new phone. His bank balance is represented by the graph below.
a. According to the graph, about how much money had Steven saved after 2 weeks of school?
b. About how much money did Steven probably have after 4 weeks of school? How can you tell?
c. If he keeps saving at the same rate, how much will he have saved by Week 7? Explain how you know.
a. According to the graph, Steven had saved about $100 after 2 weeks of school.
b. According to the graph, Steven probably had about $200 after 4 weeks of school because the graph shows that he saves an average of $50 per week, so after 4 weeks, he would have saved $50 x 4 = $200.
c. If Steven keeps saving at the same rate, he will have saved $350 by Week 7. This is because he saves $50 per week, so after 7 weeks, he will have saved $50 x 7 = $350.
What is the base, rate of change (incr/decr), and is it growth or decay
Y=3000(0.72)^x
The key features of the function are Base = 0.72, Rate = decrement and it decays
identifying the key features of the functionGiven that
y = 3000 * (0.72)ˣ
The given equation is in the form of exponential decay:
Base: The base of the exponential function is the constant term that is being raised to a power. In this case, the base is 0.72.
Rate of change: The rate of change is the factor by which the function is being multiplied or divided as the input variable increases.
Since the base is less than 1, the function is decreasing as x increases. The rate of decrease is given by the base, which is 0.72.
Growth or decay: As the base is less than 1, the function is decreasing, which means it is a decay function.
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