Joel noticed that when he runs, his heart begins to beat rapidly. Joe wants to do an experiment to see if his heart beats faster the longer he runs. Which is the best design for Joel‘s experiment?
a. Joel should get a group of people to run. Then he should ask them what their heart rates were after one minute.
b. Joe should ask someone to run at one speed. Then he should run the same amount of time at another speed.
c. Joel should run at a constant speed and measure his heart rate after different amounts of time has passed.
d. Joel should run different amounts of time at many different speeds and measured the heart rate during each run.

Answers

Answer 1

Answer:

C

Step-by-step explanation:

We can go through the process of elimination to solve the question.

A is incorrect because they are only running for a minute and the variation between time and heart rate cannot be measured.

B is incorrect because there are too many variables to account for and they are both running for the same amount of time.

D is incorrect because there are too many variables to account for and it is not a fair test as he is running at many different speeds (you can only change the independent variable which is the time).

Hence, C is the answer. It is a fair test as he is running at different speeds and keeping everything else the same.


Related Questions

Write a rule for the relation shown in the table.
X: 1, 2, 3, 4
Y: 10, 12, 14, 16

Answers

X is going up by 1
Y starts at 10 and is getting added by 2

Triangle p has b en rotated onto triangle Q
How many degrees anticlockwise has triangle P been rotated?
How many degrees clockwise has triangle P been rotated?

Answers

a. triangle P been rotated by 90 degree in anticlockwise direction

b. triangle P been rotated by 270 degree in clockwise direction

What is angle of rotation ?

In mathematics, the angle of rotation is a measurement of the amount, of namely angle, that a figure is rotated about a fixed point, often the center of a circle.

a. if we rotate the triangle P at 90 degree, from point O at anticlockwise direction, we get triangle Q

b. if we rotate triangle P at 270 degree from point O at clockwise direction, we get triangle Q

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A friend comes to visit and mentions the temperature in their hometown is currently 25 degrees
Celsius. What is this in Fahrenheit? (Write your answer as a whole number.)

Answers

Answer:

77

Step-by-step explanation:

answer: 77 degrees fahrenheit

explanation:

The formula to convert Celsius to Fahrenheit is given by °F = °C × (9/5) + 32
F = [ C × (9/5) + 32 ]
Given that, C = 25
F = 25 × (9/5) + 32
F = 45 + 32
F = 77

Refer to the diagram to the right.
a. Write an equation for the diagram to the right.
b. Find the sum.
C.
d.

Describe the sum in terms of the distance from the first addend. Explain.
What integers do the arrows represent?
0
TTTTTTTT

Answers

Answer:

Where is the diagram?

Step-by-step explanation:

3.5X divided by 9 = 4.2 divided by 5. What is X.
I came up with 54.3

Answers

Answer:

2.16

Step-by-step explanation:

if I understand the description correctly:

3.5*x / 9 = 4.2 / 5

3.5x = 4.2*9 / 5

x = 4.2*9 / 5*3.5

x=2.16

Evaluate the expression.
-2/3(1.5÷0.25÷5/4)-5/6

Answers

The value of the given expression is  -121/ 30.

PEMDAS stands for parentheses, exponents, multiplication, division, addition, then subtraction. It is basically the rule of the order in which a mathematical expression must be solved.

Here, we are given an expression- -2/3 (1.5 ÷ 0.25 ÷ 5/4) -5/6

It can be written as -2/3 (15/10 ÷ 25/ 100 ÷ 5/4) -5/6

= -2/3 (3/2 ÷  1/4 ÷ 5/4) -5/6

As per the rules of PEMDAS, we first deal with the terms inside the bracket-

(3/2 ÷  1/4 ÷ 5/4) = (3/2 × 4 × 4/5)

= (3 × 2 × 4/5)

= 24/5

Thus, the expression becomes-

-2/3 (24/5) -5/6

= -48/ 15 - 5/6

LCM of 15 and 6 is 60

⇒ -(48 × 4)/ 60 - (5 × 10)/ 60

-192/ 60 - 50/ 60

= (-192 - 50)/ 60

= -242/ 60

= -121/ 30

Thus, the value of the given expression is  -121/ 30.

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Can someone please help me I will mark u brilliant

Answers

Place it on 0, -2

(Blank space filler)

Answer:

M would be at (0,-2)

Step-by-step explanation:

The question asks you to rotate the image 180 degrees clockwise. Clockwise means towards the right, such as how a clock moves. Each axis is 90 degrees, so by moving it twice would land at (0,-2).

A horizontal line (such as the x-axis) is 180 degrees, so by mirroring the point, you would see the point is at (0,-2).

What’s the domain and range of y = |x4|

Answers

Domain: (-∞,∞) {x,x∈R }

Range: [0,∞)

Solution :

The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.

Interval Notation

Interval notation is a method to represent an interval on a number line. In other words, it is a way of writing subsets of the real number line. An interval comprises the numbers lying between two specific given numbers. For example, the set of numbers x satisfying 0 ≤ x ≤ 5 is an interval that contains 0, 5, and all numbers between 0 and 5.

Different Types Of Intervals

Intervals can be classified based on the numbers the set comprises. Some sets include the endpoints specified in the notation, while some might partially or not include the endpoints. In general, there are three types of intervals given as,

Open Interval

Closed Interval

Half-Open Interval

Let us understand the interval notation and different types of intervals in detail using solved examples.

Interval Notation:

y = |x4|

(−∞,∞)

Set-Builder Notation:

{x|x∈R}

The range is the set of all valid

y

values. Use the graph to find the range.

Interval Notation:

[0,∞)

Set-Builder Notation:

{y|y≥0}

Determine the domain and range.

Domain:

(−∞,∞),{x|x∈R}

Range:

[0,∞) , {y|y≥0}

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Hey beinggreat78, the ones with a large amount of points are for u and they also mention your name so its easier to spot them (not that i dont want u to answer all the questions)

Answers

Answer:

C.

Step-by-step explanation:

[tex]3 \div 10 = 0.3 < 0.4[/tex]

Answer:

C

Step-by-step explanation:

All work and the answer is provided in the attached screenshot! :)

1
2
3
4
5
6
-1
-2
-3
-4
-5
-6
1
2
3
4
5
6
-1
-2
-3
-4
-5
-6
u
p(u)


Write an equation for the function graphed above.

Answers

Hehehehehehdhshajhasufiifjdjdhsjsisisjshdhfjdjsisisidjdjdiiddi

what is the domain of h

Answers

Answer:

Hello. The domain is (-5, 5), which translates to option D.

-5 ≤ x ≤ 5

Simplify each expression. (9-7)^3 * 5^0 + (8+3)^2

Answers

Answer:

If your looking for the value it’s 129

(9-7)^3=8

5^0 + (8+3)^2=122

Step-by-step explanation:

There are 50 minutes left before the event begins. You have 20 balloons to inflate before the event. How much time can you spend inflating each one equally?

Answers

Answer: 24 seconds

Step-by-step explanation:

20/50=0.4

0.4*60=24

20 chocolates in a box, 2 are coconut cream, what is the probability that after eating two chocolates in a row that they are not coconut cream

Answers

Answer:

18/20 * 17/19 ≈ 0.805263158

Step-by-step explanation:

18/20 for the first chocolate not to be coco cream

then, the number of non-coco ones is lowered by 1 and the number of total too, so

17/19 for the second chocolate not to be coco cream

The chance that neither of the 2 chocolates is coconut cream is 18/20*17/19 ≈ 0.805263158

It would be 18/20 or 9/10. You know that because you would have to subtract the two that were eaten from the 20 which is 18. So then you would have 18/20. Finally, you would simplify it and get 9/10.

I hope this helps! Have an awesome day! : D

What geométric symbol would be represented by a baseball bat

Answers

Answer: i think the overall shape of a baseball bat would be more rectangular

Step-by-step explanation:

reason for thinking so: because a baseball bat depending on size, would normally fit into a rectangular box

(-5.2)(-7.8) what is it

Answers

Answer:

40.56

Step-by-step explanation:

:)

Helps solve Application

Answers

The percentage of 0 - 17 in 2015 is 23.97% and the percentage is decreasing by 0.048% in 2015

The percentage of 0 - 17 in 2015

The equation of the function is given as

P(x) = 26x^-0.03

In 2015, x = 15

Substitute x = 15 in the equation P(x) = 26x^-0.03

P(15) = 26 * 15^-0.03

Evaluate the expression

P(15) = 23.97

Hence, the percentage of 0 - 17 in 2015 is 23.97%

How fast is the percentage decreasing in 2015

The equation of the function is given as

P(x) = 26x^-0.03

Differentiate the function

P'(x) = -0.03 * 26x^-1.03

In 2015, x = 15

Substitute x = 15 in the equation

P'(15) = -0.03 * 26 * 15^-1.03

Evaluate

P'(15) = -0.048

Hence, the percentage is decreasing by 0.048% in 2015

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Home Depot entered fiscal 2017 with a total capitalization of $21,904 million. In 2017, debt investors received interest income of $877 million. Net income to shareholders was $8,654 million. (Assume a tax rate of 21%.)



Calculate the economic value added assuming its cost of capital is 10%. (Do not round intermediate calculations. Enter your answer in millions rounded to 2 decimal places.)

Answers

The economic value added (EVA) for Home Depot in the fiscal year, 2017, is $6,463.60 million.

What is the economic value added?

Economic value added (EVA) measures a company's financial performance or economic profit.

EVA is based on the residual wealth of the company for the fiscal year. It measures the value a company generates from its invested funds at the cost of capital.

EVA is calculated by deducting the cost of capital from the operating profit after tax (NOPAT).

Data and Calculations:

2017 total capitalization = $21,904 million

2017 interest paid to debt investors = $877 million

Net income to shareholders = $8,654 million

Corporate tax rate = 21%

Profit before taxes = $10,954 million ($8,654/ 1 - 0.21)

Cost of capital = 10%

= $2,190.4 million ($21,904 x 10%)

EVA = NOPAT - (Invested Capital * WACC)

= $8,654 million - $2,190.4 million

= $6,463.60 million.

Thus, the economic value added (EVA) for Home Depot in the fiscal year, 2017, is $6,463.60 million.

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Which of the dot plots shows a symmetric distribution?

Answers

The dot plot that has a symmetric distribution is option b.

What is a dot plot?

A dot plot is a graph that has similarities with a histogram. A dot plot is made up of a number line and dots. A dot plot is used to represent the frequency of a data set.

The dots in the dot plot represent the frequency of the data. The greater the frequency of a data, the greater the number of dots the number has. For example, if a number has a frequency of 6, it would have 6 dots have it.

A dot plot is symmetric if the left side of the graph and the right side of the graph are mirror images of each other. A dot plot is skewed to the left if there are more dots on the left side of the graph. A dot plot is skewed to the right if there are more dots on the right side of the graph.

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Please Answer Math 10 Part 2​

Answers

Answer:

Hello,

Step-by-step explanation:

4)

[tex]u_n=1+3*n\\u_{12}=1+3*12=37\\[/tex]

5)

[tex]u_n=-14+4*n=\\u_{10}=-14+4*10=26\\[/tex]

6)

[tex]u_n=\dfrac{5}{3} +\dfrac{n}{3} \\\\u_{16}=\dfrac{5}{3} +\dfrac{16}{3} =\dfrac{21}{3} =7[/tex]

the answers are below;

4. 37

5. 26

6. 7

please refer to the image

Answers

Check out the attached photo

what is the answer to 0.25 x 2.6 this is for hw

Answers

.650 is going to be your at

Plot the intercepts to graph the equation.
2x−8y=−8
Graph it

Answers

Answer:

Graphed it for you!

Step-by-step explanation:

If w = 18, what is the value of 3w − 11?

A: 307
B: 65
C:43
D: 10

Answers

Answer: 43 ==> C

Step-by-step explanation:

3w − 11=

3(18)-11=

54-11=43 ==> C

Answer:

c, 43

Step-by-step explanation:

3 times 18, minus 11


Is 7 hundreds + 4 thousands + 27 ones greater than, less than or equal to 6 thousands + 4 hundreds? *

Answers

Answer:

6 thousands + 4 hundreds

4727>6400

Step-by-step explanation:

4727<6400

4,727 is less than 6,400

If Sarah starts with $10 and spends all but $3, how much money does she have left?

Complete the following subtraction exercises.
10 – 2 =
14 – 6 =
15 – 9 =
17 – 8 =
13 – 5 =
11 – 8 =
20 – 8 =
16 – 7 =
12 – 9 =
21 – 9 =
11 – 6 =
5 – 5 =
4 – 0 =
16 – 8 =
10 – 5 =
18 – 7 =
13 – 8 =
12 – 4 =

Solve each of the following subtraction problems.
a. 6,321 – 4,879 =
b. 451 – 275 =
c. 15,278 – 6,327 =
d. 23,000 – 14,995 =
e. 54 – 19 =

On February 1, the electricity meter reading for the Smith residence was 19,423 kilowatt hours. On March 1, the meter read 20,288 kilowatt hours. On April 1, the meter read 21,163 kilowatt hours.
a. How many kilowatt hours of electricity did the Smiths use during February?
b. How many kilowatt hours did they use during March?

Last year, Terry earned $19,436. This year, Terry got a raise that increased her income to $23,457.
a. How much more money did Terry make this year?
b. If Terry gets the same raise again next year, what will her total income be then?

The height of the Leibnitz Range on the moon is 35,000 feet. The earth’s highest point, Mount Everest, measures 29,028 feet. How much taller is the Leibnitz Range?

On a word processing test, Iko typed 694 words in 15 minutes. On that same test six days later, Iko typed 753 words in 15 minutes. By how many words did Iko’s speed improve from the first test to the second test?

Perform each operation. Check by using the inverse operation.
a. 769 – 362 =
b. 502 + 17 =
c. 7,802 – 3,461 =
d. 1,432 + 2,568 =

Answers

Hi!

#1: Sarah would have $3 left.

#2:

10-2=8

14-6=8

15-9=6

17-6=11

13-5=8

11-8=3

20-8=12

16-7=9

12-9=3

12 – 9 = 3

21 – 9 = 12

11 – 6 = 5

5 – 5 = 0

4 – 0 = 4

16 – 8 = 8

10 – 5 = 5

18 – 7 = 11

13 – 8 = 5

12 – 4 = 8

#3:

a. 6,321 – 4,879 = 1,442

b. 451 – 275 = 176

c. 15,278 – 6,327 = 8,951

d. 23,000 – 14,995 = 8,005

e. 54 – 19 = 35

#4

a. How many kilowatt hours of electricity did the Smiths use during February?

They used 19,423 (I believe)

b. How many kilowatt hours did they use during March?

They Used 865

#5:

Last year, Terry earned $19,436. This year, Terry got a raise that increased her income to $23,457.

a. How much more money did Terry make this year?

39,893 (I believe)

b. If Terry gets the same raise again next year, what will her total income be then?

63,350 ( i believe)

#6: 5,972 Ft taller

#7: 59 words.

#8:

a. 769 – 362 = 407

b. 502 + 17 = 519

c. 7,802 – 3,461 = 4,341

d. 1,432 + 2,568 = 4,000

In the figure below, parallelogram ABCD was
translated to parallelogram A'B'C'D'.

How many units and in which direction were
the x-coordinates of parallelogram ABCD
moved?

A. Left 3
B. Right 3
C. Left 7
D. Right 7

Answers

Answer:

C. Left 7

Step-by-step explanation:

The question asks us about the number of units the x-coordinates of the parallelogram moved, therefore we have to look for the horizontal translation of the points A, B, C, and D.

To do this, we can look at the position of any of these points and the position of its corresponding point, to figure out how many units to the left or right they have moved.

For example, let's look at A and A':

To go from A to A', we have to move 7 units to the left.

It's the same for B and B' as well as the other points and their corresponding points.

Therefore the x-coordinates of parallelogram ABCD have moved 7 units to the left.

PLEASE HELP URGENT
Find the value of the variables. Then find the measure of each angle in the diagram.

Answers

The value in fig 4 x = 18.7 and γ = 12.72 . The value in fig 5 x = 10 and γ = 40 .

In figure 4 .

Solving linear equation in two variable

10 γ + 4 x - 22 = 180

3 γ + 11 + 7 x + 4 = 180

10 γ + 4 x = 202     ... eq 1

3 γ + 7 x = 169       ... eq 2

mult. ... eq 1 by - 3 and ... eq 2 by 10 .

- 30 γ - 12 x = - 606

30 γ + 70 x = 1690

Adding above 2 eqns

58 x = 1084

x = 18.7

γ = 12.72

Measurement of angles : 127.2 degrees , 52.8 degrees 134.9 degrees , 49.16 degrees .

In fig . 5

4 x + 13 x + 10 = 180

17 x = 170

x = 10

2 ( γ + 25 ) + 2 γ - 30 = 180

4 γ + 20 = 180

4 γ = 160

γ = 40

Measurement of angles are 130 degrees , 50 degrees , 130 degrees , 50 degrees  .

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What is the correct graph for:
equation: y= x^2 - 1

Answers

Answer:

The first graph.

Hope this helps :)

Step-by-step explanation:

The y-intercept in the equation y = x^2 - 1 is -1.

So the first graph represents the point where the line intercepts the y-axis which is at - 1.

The y-intercept for the second graph is not - 1.

So the first graph would be correct for the equation

So the first graph would be correct for the equation y = x^2 - 1


b. A lap pool has a length of 27 yards, a width of 23 yards, and a depth of 5 yards. Find the pool's surface area (the water surface) and the total volume of water that the pool holds.

Answers

The volume is 3105 and the surface area is 1742

What is the volume of and what is the surface area?

The given parameters are

Length = 27 yards

Width = 23 yards

Height = 5 yards

The volume is

Volume = Length * width * height

So, we have

Volume = 27 * 23 * 5

Evaluate

Volume = 3105

The surface area is

A =2 *(LW + LH + WHW)

So, we have

A = 2 * (27 * 23 + 27 * 5 + 23 * 5)

Evaluate

A = 1742

Hence, the volume is 3105 and the surface area is 1742

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