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Answers
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Answer:
a) at t=12, Whitney is speeding up
b) 13/48 = 0.2704833 . . . miles/min; not a good measure
Step-by-step explanation:
a) At t=12, Whitney's velocity is -0.2 miles/min and is decreasing. That is, the magnitude of her velocity (speed) is increasing. Whitney is speeding up at t=12.
__
b) The (signed) area under the curve, divided by the time period (24 min) will give Whitney's average velocity. It can be found by using the formulas for area of a trapezoid and triangle.
distance 0-11 = 1/2(11 +3)(0.8) = 5.6 miles
distance 11-16 = 1/2(5)(-0.6) = -1.5 miles
distance 16-24 = 1/2(8)(0.6 = 2.4 miles
Whitney's average velocity is ...
(5.6 -1.5 +2.4)mi/(24 min) = 6.5 mi/(24 min) = (13/48) mi/min ≈ 0.270 mi/min
The laws of physics tell us that no work is being done if velocity is constant. Hence, the strenuousness of Whitney's pedaling depends on the acceleration she is maintaining. The average velocity measure tells nothing of that, so is a poor measure of how strenuously Whitney is pedaling.
Related Questions
Solve for x 4(x+9)= 3(2x - 7)
Answers
Answer: X= 57/2
Hope this helps!
Answer:
x = 28.5
Step-by-step explanation:
1. Write the equation
4(x+9) = 3(2x - 7)
2. Distribute
4x + 36 = 6x - 21
3. -4x from both sides
36 = 2x - 21
4. +21 on both sides
57 = 2x
5. Divide 2 on both sides
x = 28.5
Help extra points and mark brainlist
Answers
Answer:
Median is 7
Step-by-step explanation:
Give me brainllest
write an ordered pair corresponding to the point
Answers
Answer:
(-3,-1)
Step-by-step explanation:
go back 3 for x
and down 1 for y
How much lemon juice must be added to 4 litres of water to make a lemonade
solution that contains 20% lemon juice?
Answers
20% of 4 liters is .8 liters.
What is the equation for f(x)
Answers
Answer:
it's a black image theres no line
can someone do my last question and actually try it
Answers
Answer:
What's the question?
Step-by-step explanation:
How can I find f?
Please help if you can!
Answers
63 is the answer
Answer:
63°
Step-by-step explanation:
i=62° f+i=125° 125-62=63
ILL GIVE THE BRAINLIEST pls help me with this question EVERYTHING IS IN THE PICTURE PLS HELP DUE TODAY IF YOU PUT A WRONG ANSWER ILL REPORT YOU FASTER THAN ASSIGMENT IS DUE
Answers
Answer:
90mm cubed
Step-by-step explanation:
Answer:
90 mm³
Step-by-step explanation:
V = area of base multiplied by height
base in this example is the triangle, which has an area of 15/2 or 7.5
height = 12
12 x 7.5 = 90
the model below is shaded to represent an expression. which expression represents the model? PLS HELPPPPP
Answers
Answer:C
Step-by-step explanation:
The expression that most adequately expresses the model would be:
C). 3 × 2/5
What is a fraction?A fraction is described as an expression employed to denote a segment or section belonging to a larger whole.
In the given question, it can be observed that the model contains 10 parts in total with a division of 5 each into 2 parts.
Since the division of 2 is made thrice, it gives 3 × 2/5 which makes the third option the correct one.
Thus, option C is the correct answer.
Learn more about "Expression" here:
brainly.com/question/14083225
It takes at 45 minutes to complete his science homework. It takes him 2/3 as long to complete his math homework. How long does it take add to complete his math homework?
Answers
Answer:
30 minutes
Step-by-step explanation:
45 = 15 +15 +15 (3 parts of 15)
2 parts of 15 = 30
Please help I’ll mark you as brainliest if correct
Answers
Answer:
Y= 250x+45
Step-by-step explanation:
answer = 250 per hour (X) + 45
Express 0.009 as a percentage
Answers
0.009 = 0.9%
The answer is 0.9%
I WILL REWARD BRAINLIEST TO CORRECT ANSWER!!!
Answers
intercepts are determined where points are on the y or x axis and are y = mx + B (it is b)
linear functions and equations can be graphs by y = mx + b or y = mx
As part of a study of corporate employees, the director of human resources for PNC, Inc. wants to compare the distance traveled to work by employees at its office in downtown Cincinnati with the distance for those in downtown Pittsburgh. A sample of 40 Pittsburgh employees showed they travel a mean of 370 miles per month. A sample of 35 Cincinnati employees showed they travel a mean of 380 miles per month. Do the Cincinnati employees travel the same distance to work, on average, as the Pittsburgh employees
Answers
Answer:
Both groups of Employees do not travel the same distance to work hence we will reject the Null hypothesis
Step-by-step explanation:
40 Pittsburgh employees mean travel time = 370 miles
35 Cincinnati employees mean travel time = 380 miles
Both groups of Employees do not travel the same distance to work hence we will reject the Null hypothesis
H0 : μ1 = μ2
H1 : μ1 ≠ μ2
mean = total distance / Number of employees
For Pittsburgh
370 = x / 40
x = 370 * 40 = 14,800 miles
For Cincinnati
380 = y / 35
y = 380 * 35 = 13,300 miles
The slopes of perpendicular lines are
A. negative reciprocals
B. opposites
C. reciprocals
O D. identical
Is urgent no links
Answers
Answer:
A. Negative reciprocals
Pls help asap help I’ll mark brainleast
Answers
Answer:
C
Step-by-step explanation:
1/2bh is the formula for the area of a triangle
multiply the base and the height
9 x 19 = 171
then multiply by 1/2 or divide by 2
171/2 = 85.5 or 85 1/2
HELP ASAP
if dy/dx = 2 - y, and if y = 1 when x = 1, then y = ??? PHOTO ATTACHED
Answers
Answer:
y=2-e^(1-x)
Step-by-step explanation:
This can be solved by separating the variables.
dy/dx=2-y
Multiply both sides by dx
Divide 2-y on both sides
dy/(2-y)=dx
Integrate both sides
-ln|2-y|=x+c
Multiply both sides by -1
ln|2-y|=-x-c
Equivalent logarithm form
2-y=e^(-x-c)
Minus 2 on both sides
-y=e^(-x-c)-2
Multiply both sides by -1
y=-e^(-x-c)+2
The ordered pair (1,1) belongs to the curve so we have
(I'm going to use this earlier form -ln|2-y|=x+c)
-ln|2-1|=1+c
-ln|1|=1+c
-0=1+c
0=1+c
Minus 1 on both sides
-1=c
Answer:
y=-e^(-x-(-1))+2
Or
y=-e^(-x+1)+2
Or
y=2-e^(1-x)
In each of the following scenarios, determine if the data are paired.
1. We would like to know if Intel's stock and Southwest Airlines' stock have similar rates of return. To find out, we take a random sample of 50 days for Intel's stock and another random sample of 50 days for Southwest's stock.
a. Paired
b. Not Paired
2. We randomly sample 50 items from Target stores and note the price for each. Then we visit Walmart and collect the price for each of those same 50 items.
a. Paired
b. Not Paired
3. A school board would like to determine whether there is a difference in average SAT scores for students at one high school versus another high school in the district. To check, they take a simple random sample of 100 students from each high school.
a. Paired
b. Not Paired
Answers
Answer:
1. Can be Paired or Not Paired
2. Paired
3. Not Paired
Step-by-step explanation:
Two sets of observations are paired if each observation in one set has a special correspondence or connection with exactly one observation in the other data set.
1. Can be Paired or Not paired
Reason -
We might look at testing the difference of means using a two sample t-test. However, we may also try running a paired t-test.
But its used in cases where the observations are usually from the same populations at different times or through different sources etc.
Hence can't conclude that it is paired or not paired.
2. Paired
Reason -
Each record is a price of the same item from different stores.
3. Not paired
Reason -
This is again a case of testing the difference of means of two-samples (2 independent samples precisely) that are not paired.
1. Can't conclude paired or not paired
2. Paired
3. Not Paired
What do you mean by paired or unpaired?Two sets of observations are said to be paired if each observation in one data set has a specific connection with exactly one observation in the other data set otherwise it is unpaired.
1. Can't conclude paired or not paired because It may look at testing the difference of means using a two-sample test, But it's used in cases where the observations are from the same populations at different times or through various sources, etc.
2. Paired because each item is the price of the same item from different stores.
3. Not paired because in this case of testing the difference of means of two independent samples that are not paired.
Learn more about paired and unpaired:
https://brainly.com/question/15182074
Read the description of a proportional relationship.
Ezra is finding the perimeter of different-sized regular pentagons. There is a proportional relationship between the side length of the regular pentagon in inches, x, and the perimeter of the regular pentagon in inches, y.
A regular pentagon with 1-inch side lengths has a perimeter of 5 inches. Write the equation for the relationship between x and y.
y=
Answers
Answer:
Step-by-step explanation:
The answer is 15
the equation for the relationship between x and y is,
y = 5x
What is perimeter?A perimeter is a closed path that encompasses, surrounds, or outlines either a two dimensional shape or a one-dimensional length. The perimeter of a circle or an ellipse is called its circumference. Calculating the perimeter has several practical applications.
Perimeter refers to the total outside length of an object,
The equation given in the problem is
y = 5x
where
the side length of the regular pentagon in inches, x,
the perimeter of the regular pentagon in inches, y
Hence, the equation for the relationship between x and y is,
y = 5x
Learn more about perimeter here:
brainly.com/question/397857
#SPJ2
A quiz has 5 true-false questions and 3 multiple choice questions with 4 options each. How many possible ways are there to answer the 8 questions?
a.
48
c.
4024
b.
2024
d.
2048
Answers
Answer:
The correct answer is D
Step-by-step explanation:
the dude above me made a small typo, but they are right
The picture is my proof
have a nice day! :)
Ron has 10 marbles that are the same size and
shape in a bag. Of these, 4 are blue and 6 are
green. He selects 2 marbles, one after the other,
and DOES NOT REPLACE the first marble. What is
the probability that he will select 2 green marbles?
Answers
Answer:
??
Step-by-step explanation:
Solve for c: 60= 15c
Answers
Answer:
c=4
Step-by-step explanation:
Answer:
C=4.
Step-by-step explanation:
You divide 15c and 60 by 15 getting you c=4.
Find the sum of the first 36 terms of the following series, to the nearest integer.
13, 19, 25,
Answers
Answer: 15
Step-by-step explanation:
Answer:
i concluded that it's 4248
What is the m
Need help please!
Answers
9514 1404 393
Answer:
27
Step-by-step explanation:
The measure of an inscribed angle is half the measure of the arc it subtends.
∠P = (RT)/2
∠P = 54/2
∠P = 27
Based on the scatter plot above, describe the relationship between the moves and the score of the Solitaire game.
Answers
Answer:
The moves and score have an inverse linear relationship. The more moves the person makes, the lower their score. The less moves the person makes, the lower their score.
Step-by-step explanation:
Can you help me thanks!
Answers
Answer:
multiply
Step-by-step explanation:
You have to multiply.
Example:
[tex] {5}^{2} [/tex]
You have to multiply 5x5 because it says
[tex] {5}^{2} [/tex]
PLS HELP I NEED THIS BY TOMORROW
Rearrange the parts of the parallelogram to form a rectangle. Find the area of the parallelogram and the area of the rectangle. How are the areas related?
Make a copy of the trapezoid to form a parallelogram. Find the area of the trapezoid and the area of the parallelogram. How are the two areas related?
Answers
When we do this, the base of the parallelogram has length b 1 + b 2, and the height is the same as the trapezoids, so the area of the parallelogram is (b 1 + b 2)*h. Since the two trapezoids of the same size created this parallelogram, the area of one of those trapezoids is one half the area of the parallelogram
Name
Austin - 4-12-21
Whole Numbers and Fractions
In 1-6, write an equivalent fraction for each whole number,
1. 6
2. 8
3. 4
4. 3
5. 1
Answers
Each one is just that whole number over one.
For instance for the number 7 it would be 7/1.
Hope this helps!
You are the coach of the girls’ basketball team at a local middle school. It is the fifth game of the season, the game is tied, and there are only 5 seconds left on the clock. The referee has called a technical foul on the other team. You get to choose any one of your girls to take the shot. Basing your decision only on on their free-throw shooting thus far this season, whom would you pick, Becky or Rachel? Becky has made 8 of 12 free throws. Rachel has made 15 of 20 free throws.
Answers
Answer: Becky I guess
Step-by-step explanation:
a country has a national debt of $6x10^12. if the population of the country is 300 million people, how much will it be for every man, women, and child in the country?
Answers
Answer:
$20000
Step-by-step explanation:
6*10^12/ 300 million
