No joke answers. No links. Will award BRAINLIEST if correct!!Question 12 (1 point)
A scientist is interested in whether stretching before running 5 kilometers will improve a runner's time. The
scientist decides that an experimental study is the best method to use to answer the question. One group of
runners will run a 5-kilometer race without stretching, and a second group of runners will follow a specific
stretching routine before running the race. The finishing times will be recorded, along with the group type for
each runner
The group that raced without stretching has a mean finish time of 23.5 minutes and a standard deviation of 2.6
minutes. Write a sentence or two that summarizes any conclusions that can be made about the statistical
question, "Does stretching before running a race improve a runner's time?"

Answers

Answer 1

Answer:

Yes

Step-by-step explanation:


Related Questions

Find the value of x.
a) 80
b) 90
c) 45
d) 60​

Answers

Answer:

b

Step-by-step explanation:

The tangent- tangent angle x is half the difference of its intercepted arcs.

Th sum of the arcs in a circle = 360°

major arc = 360° - 90° = 270° , then

x = [tex]\frac{1}{2}[/tex] (270 - 90)° = [tex]\frac{1}{2}[/tex] × 180° = 90° → b

Write a quadratic function f whose zeros are -3 and -8

Answers

Answer:

y = x² + 11x + 24

Step-by-step explanation:

y = (x + 3)(x + 8)

Expand

y = x² + 8x + 3x + 24

Combine like terms

y = x² + 11x + 24

please someone help this is my sisters problem that shes been stuck on and its middle school work so if anyone could help it would mean a lot! NO LINKS OR FILES OR I WILL REPORT

Answers

Answer:

the answer is 22

Step-by-step explanation:

77/3.5=22

It’s 22 inches........

Twins issac and isaiah were just born issac weighs 6 pounds 2 ounces and isaiah weighs 5 pounds 4 ounces.How many ounces do issac and isaiah weigh together?

Answers

Answer: [tex]11\ \text{pounds}\ 6\ \text{ounces}[/tex]

Step-by-step explanation:

Given

Issac and Isaiah born weighing 6 pounds 2 ounces and 5 pounds and 4 ounces.

1 Pound is equivalent to 16 ounces

Issac weighs

[tex]\Rightarrow 6+\dfrac{2}{16}\ \text{Pounds}[/tex]

Isaiah weighs

[tex]\Rightarrow 5+\dfrac{4}{16}\ \text{Pounds}[/tex]

Their combined weight is

[tex]\Rightarrow 6+5+\dfrac{2}{16}+\dfrac{4}{16}\\\\\Rightarrow 11+\dfrac{6}{16}\ or\\\\\Rightarrow 11\ \text{pounds}\ 6\ \text{ounces}[/tex]

Please help, will give brainliest

Tom wants to order tickets online so that he and three of his friends can go to a waterpark. The cost of the tickets is $16.00 per person. There is also a $2.50 one-time service fee for ordering the tickets online. Write an expression in terms of n that represents the cost for ordering n tickets online.

Answers

Answer:

(16*n)+2.5=c

Step-by-step explanation:

c=cost

n=amount of friends.

Have a great weekend!! :)

I REALLY NEED HELP RIGHT NOW! THE CORRECT ANSWER GETS BRAINLIEST!! PLZZZZZ!!!

Answers

Answer:

D

Step-by-step explanation:

since this feels like a sequence, a1 should be the first Expression to the arimethic sequence and the rest should be the (n - 1)d so I think it should be 1/2 + 4(an - 1)

note: arimethic sequence formula is a + (n - 1)d

what is the sign of -8+8

Answers

it is 0

there is no sign to -8 + 8

Answer:

Your answer would be 0

Step-by-step explanation:

if you were asking a question like, 8+8 your answer would be, 16. Correct me if I'm wrong. ☆

The volume of two similar solids are 128 m3
and 250 m². The surface area of the larger
solid is 250 m². What is the surface are of the
smaller solid?

Answers

Answer:

Solution given:

The volume of two similar solids are 128 m³

and 250 m³.

surface area of larger solid is 250m²

let surface area of smaller solid be x.

Since they are similar

[tex] \frac{250}{128} = \frac{250}{x} [/tex]

x=128

the surface are of the

smaller solid is 128m²

if dy/dx = ysec^2(x) and y= 5 when x = 0, then y=?

А. e^tanx +4
B. e^tanx +5
C. 5e^tanx
D. tanx + 5
E. tanx + 5e^x

Answers

Answer:

C. [tex]\displaystyle y = 5e^{tan(x)}[/tex]

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

BracketsParenthesisExponentsMultiplicationDivisionAdditionSubtractionLeft to Right

Equality Properties

Multiplication Property of EqualityDivision Property of EqualityAddition Property of EqualitySubtraction Property of Equality

Algebra I

FunctionsFunction Notation|Absolute Values|Anything to the 0th power is 1

Algebra II

Logarithms and Natural logsEuler's number e

Calculus

Derivatives

Derivative Notation

Trig Derivatives

Differential Equations

Separation of variablesGeneral and particular solutions

Antiderivatives - Integration

Integration Constant C

Trig Integration

Logarithmic Integration

Step-by-step explanation:

Step 1: Define

Identify

[tex]\displaystyle \frac{dy}{dx} = ysec^2(x)[/tex]

x = 0, y = 5

Step 2: Rewrite Differential

Separation of variables

[Division Property of Equality] Isolate y terms together:                             [tex]\displaystyle \frac{1}{y}\frac{dy}{dx} = sec^2(x)[/tex][Multiplication Property of Equality] Isolate x terms together:                   [tex]\displaystyle \frac{1}{y}dy = sec^2(x)dx[/tex]

Step 3: Find General Solution

[Equality Property] Integrate both sides:                                                     [tex]\displaystyle \int {\frac{1}{y}} \, dy = \int {sec^2(x)} \, dx[/tex][1st Integral] Integrate [Logarithmic Integration]:                                         [tex]\displaystyle ln|y| = \int {sec^2(x)} \, dx[/tex][2nd Integral] Integrate [Trig Integration]:                                                   [tex]\displaystyle ln|y| = tan(x) + C[/tex][Equality Property] e both sides:                                                                   [tex]\displaystyle e^{ln|y|} = e^{tan(x) + C}[/tex]Simplify:                                                                                                         [tex]\displaystyle |y| = Ce^{tan(x)}[/tex]Rewrite:                                                                                                         [tex]\displaystyle y = \pm Ce^{tan(x)}[/tex]

Step 4: Find Particular Solution

Substitute in variables [Function]:                                                               [tex]\displaystyle |5| = Ce^{tan(0)}[/tex]Evaluate absolute value:                                                                               [tex]\displaystyle 5 = Ce^{tan(0)}[/tex]Evaluate trig:                                                                                                 [tex]\displaystyle 5 = Ce^0[/tex]Evaluate exponent:                                                                                       [tex]\displaystyle 5 = C(1)[/tex]Multiply:                                                                                                             [tex]\displaystyle 5 = C[/tex]Rewrite:                                                                                                         [tex]\displaystyle C =5[/tex]Substitute in C [General Solution]:                                                               [tex]\displaystyle y = 5e^{tan(x)}[/tex]

∴ Our answer is C.

Topic: AP Calculus AB/BC (Calculus I/II)

Unit: Differential Equations

Book: College Calculus 10e



Bus A and Bus B leave the bus depot at 3 pm.
Bus A takes 25 minutes to complete its route once and bus B takes 30 minutes to complete its route once.
If both buses continue to repeat their route, at what time will they be back at the bus depot together?
Assume the buses have no breaks in between routes.
Give your answer as a 12-hour clock time.

Answers

Answer:

5:30 pm.

Step-by-step explanation:

First find the LCM (lowest common multiple) of 25 and 30. This is the amount of minutes it will take for the buses to meet again.

25 can be broken up into 5*5

30 can be broken up into 5*6

The most amount of 5s found in a number is two times in 25 and the most amount of 6s found in a number is once in 30, so

25*6=150

150 is the LCM. This means that in 150 minutes, the buses will be back at the bus depot together.

All we have to do now is convert 150 minutes to hours.

One hour is 60 minutes, so 150/60 is 2.5 hours, or 2 hours and 30 minutes.

2 hours and 30 minutes after 3 pm is 5:30 pm.

your resturaunt bill is 42$ you want to leave a 15% tip, what should the tip be

Answers

Answer:

$6.30

Step-by-step explanation:

Answer:

The tip should be $6.30

Step-by-step explanation:

We can find 15 percent of 42$ by multiplying 42 by 0.15 (this is another way of writing down 15%) and so we get...

(42)(0.15) = 6.3

Therefore the tip should be $6.30

help please help help help

Answers

Answer:

area = 32

perimeter = 30

Step-by-step explanation:

Formulas:

Area of a parallelogram: A = bh

Perimeter of a parallelogram: P = 2 ( b + s )

Where h = height s = slant height and b = base length

Define:

b = 8

h = 4

s = 7

Plug in given values into formulas and calculate

A = (8)(4)

8 * 4 = 32

A = 32

P = 2 ( 8 + 7 )

8 + 7 = 15

2(15) = 30

P = 30

What is 3 1/4 in cups as a whole number or mixed number in simplest form?

Answers

Answer:

3/4 = 34 = 0.75.

Step-by-step explanation:

Jasiah wants to buy a bicycle that costs $330. He has saved $50 so far and will save $40 each week until he has enough money to buy the bicycle​

Answers

The answer is $280

Working:

Answer:

$280

Step-by-step explanation:

There are 2 ways to do the question.

Method 1: $330-$50=$280

Method 2: 7 days equals to one week=$40.

$40×7=$280

Hope these helps you!

Helpppppppp plz!!!!!!!!!

Answers

Complementary angles have the sum of 90 degrees
Add angle A and angle B
(8x+27) + (6x-21) = 90
14x + 6 = 90
14x = 84, x = 6
Plug 6 into angle B equation
6(6) - 21 = 36 - 21 = 15

Solution:

plz solve this question mhanifa

Answers

Answer:

Option B

Step-by-step explanation:

Given:

4 - 3i

Conjugate of the given number is:

4 + 3i

Divide the given number by its conjugate:

(4 - 3i) / (4 + 3i) = (4 - 3i)(4 - 3i) / (4 + 3i)(4 - 3i) =(16 + 9i² - 24i) / (16 - 9i²) = (16 - 9 - 24i) / (16 + 9) = (7 - 24i) / 25 = 7/25 - 24i/25

Correct choice is B

What is 3/5 • 6/5??

Answers

Answer:

0.72

Step-by-step explanation:

3/5 X 6/5 = 0.72

The same data are graphed in each histogram, but with different intervals. Which histogram has the best interval to draw conclusions on the height of the shortest player? A bar graph titled Height of players has height in inches on the x-axis and players on the y-axis. 4 players have a height of 60 to 69 inches and 12 players have a height of 70 to 79 inches. A bar graph titled Height of players has height in inches on the x-axis and players on the y-axis. 2 players have a height of 60 to 64, 2 have a height of 65 to 69, 7 have a height of 70 to 74, 5 have a height of 75 to 79. A bar graph titled Height of players has height in inches on the x-axis and players on the y-axis. 1 player has a height of 60 to 63, 2 have a height of 64 to 67, 3 have a height of 68 to 71, 7 have a height of 72 to 75, and 3 have a height of 76 to 79.

Answers

Answer:

c

Step-by-step explanation:

Answer:

c

Step-by-step explanation:

ФФФФ↓↓∴Ф⊄⊄∠㏒㏑↑↑↑↑⇒⇒⇒⇒Δ≅√√βΔФ∉∴∨↓∈ЛБХаЩЪ

2) Find the Volume
The volume is
cubic centimeters.
4 cm
4 cm
4 cm

Answers

the volume is 12 cm just multiple each 4

Que numero que elevado al cubo da -125?

Answers

Answer:

-5

Step-by-step explanation:

Make:

(-5)³ = (-5)×(-5)×(-5) = 25×(-5) = -125

Angles: Arcs & Angles need help thank you!!

Answers

Answer:

See answers below

Step-by-step explanation:

1) The typr of triangle in a semicircle is a right angle. Hence the measure of  m<ABC  is 90degrees

2) m<DEF = 1/2(144)

m<DEF = 144/2

m<DEF = 72degrees

3) From the trinagle

4x+3 + x+7 +90 ==180

5x + 100 = 180

5x = 180-100

5x = 80

x = 80/5

x = 16

<QRD =  x+7

m<QRD = 16 + 7

m<QRD = 23degrees

4)  Angle in the same segment are equal

5x-37= 3x+1

5x - 3x = 1+37

2x = 38

x = 38/2

x =19

arc NM = 2m<P

arc NM = 2(3x+1)

arc NM = 2(3(19)+1)

arc NM = 2(58)

arcNM = 116degrees

I’m really confused on how to write the range of inequality because it’s been a while. Can someone please help??



Answers

Answer:

y ≤ 0

Step-by-step explanation:

The arrow says that the function keep going down

the biggest y is 0

so we can write

y ≤ 0

3, 4, 5, 7, 9, 10, 2, 8

Mean__
Median__
Mode__
Range__

Answers

Mean- 6

Median- 6

Mode- 3, 4, 5, 7, 9, 10, 2, 8

Range- 8

Hope this Helped! :T

He is correct above

need help. asap. also need an explanation for the problem. :)

Answers

Answer:

124858

Step-by-step explanation:

The first 4 digits are simple, you multiply the first digit of the equation by the 2nd digit and then for the other 2 you multiply the first digit of the equation by the 3rd digit.

6 + 2 + 8

6 * 2 = 12

6 * 8 = 48

Then the last 2 digits are the sum of the products of the 1 and 2 and 1 and 3 and subtract it by the 2

12 + 48 = 60

60 - 2 = 58

Put them together

Savannah has a package of 20 candies with an equal number of candies colored white, blue, orange, purple, and yellow. If Savannah selected a yellow candy the first time, what is the
probability that she will randomly select, without replacement, another yellow candy?
A 3/19
B 1/5
C 4/19
D 1/4

Answers

Answer:

A 3/19

Step-by-step explanation:

There are 4 candies of each color. If you take out one yellow, you not only have three yellows; you have 19 candies. 3/19 is the answer.

Answer:

3/19

Step-by-step explanation:

There is an equal number of colored candies, in which there are 20 candies in all, and 5 colors:

20/5 = 4

Each color has 4 candies.

Savannah was able to obtain a yellow candy, and she does not replace it:

4/20 removing one yellow candy = 3/19

A) 3/19 is her chance of getting another yellow.

Please help!!! T^T

Sarah buys 2 gallons of milk. There are approximately 3.875 liters in a gallon. How many milliliters of milk did Sarah buy?

Answers

Hello, I hope this helps!

Answer:

3.875 * 2

= 7,570.82 ml

Sarah bought 7,570 ml of milk

30 POINTS!!!!

HELP PLEASE!!!

Answers

Answer:

Step-by-step explanation:

Answer:

First Position: √22

Second Position: √19

Third Position: √21

Fourth Position: √18

Ellen is filling the pool shown in the figure for her little brother. She can carry 2
5
8 gallons of water each trip. Write and solve an equation to find how many trips she needs to make.

Answers

Answer:

the answer is 6 trips.

Step-by-step explanation:

Can I see the figure? Or the picture of your homework?

Pleaseeee help #10 Which table below describes a linear function?
7 points
y
o
o
o
O
A
1
1
1
2
4
16
4
8
9
81
9
18
у
y
0
0
0
B
1
3
D
1
2
W
4
9
4
4
9
20
9
Ο Α
OB
Ос
Oo

Answers

Answer:a

Step-by-step explanation:

URGENT , Find the measure of the arc indicated. Assume that lines which appear to be diameters are actual diameters

Answers

43m
i think that's the answer not 100% though
Other Questions
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Explain whether the following results are consistent with the model, and if not, explain the expected number of male births and the expected number of female births for 300 trials.In 300 simulated trials, 171 of the births are female and 129 are male. 1 hundredth + 3 tenths =?hundredths Hurry Brainliest!Ice Cream Inc. is offering a 25% discount for teachers during the summer break. If the regular price of a large sundae is $7.50, how much will teachers spend on each sundae? Slove it step by step Discriminat of 3x^2+15x-6=0 Blue whales apparently communicate with each other using sound of frequency 17.0 Hz, which can be heard nearly 1000 away in the ocean. What is the wavelength of such a sound in seawater, where the speed of sound is 1531 m/s Which of the following is NOT a characteristic of plants? A. Regulate the water cycle B. Are used in medicine C. Provide food, air and habitat D. Organisms which feed on dead organisms or waste from living organisms Live as a guideContentidecleaveThe FILIPINO PYRADoing 30 minutes of the different physical activities a day is healthy and rewareshould help everyone select activity that del MS nls lifestyle and healthDon't waste your time, manage it, and start your own exercise program.AssessmWhat I Have Learnedultiple Choice:rections: Select the le"WWHDirections: Please write one (1) sentence answer in every question. Copy theand write your answer inside the box in your activity notebook.Running, walking, juA. Bone-strengtB. FlexibilityWhy did you learn?How did you learn?What did you learn?Which group is notA. Gardening aB. Soccer andC. Walking theD. None, theyIt is recommendedtivity throughout thA. 18 years o4 Select the correct answer.Find the inverse of function f.95 + 7 Which characteristic of a Shakespearean romance is obvious in Act I Scene i? After its Saturday competition, a swim team ordered three orders of pizza rolls and five orders of fried pickles for a total cost of $22. After its Tuesday night competition, the team ordered six orders of pizza rolls and two orders of fried pickles for a total cost of $28. what is the price of each appetizer? show your work. Please help Classify the triangle with side lengths of 5, 6, 7 In a survey of 802 U.S. adult drivers, 265 state that traffic is getting worse in their community. Construct a 95% confidence interval for the proportion of residents who think traffic is getting worse in their community. Transcribe this strand of DNA into a strand of mRNATAC-AAA-CCC-TTT-GGG-ATA-ACT Question 1Researchers want to find a way to increase the growth rate of corn so it can be harvested more often. To test the effectiveness of a new type of spray fertilizer, plants grown from 200 corn seeds were divided equally into two groups: a treatment group and a control group. The treatment group was frequently sprayed with the new type of fertilizer. The growth in centimeters of each corn plant was noted before and after the treatment.The results showed that the mean change in the growth rate by the treatment group is 8 points more than that of the control group. To test whether the results could be explained by random chance, researchers created a table that summarizes the results of 1,000 re-randomizations of the data with differences of means rounded to the nearest 2 points.Consider the significance level to be set at 5%, so results less than 5% can be considered statistically significant.Part BQuestionWhich statement is true about the result considering a significance level of 5%?The result is not statistically significant, which implies that spraying the corn plants with the new type of fertilizer does increase the growth rate.The result is statistically significant, which implies that spraying the corn plants with the new type of fertilizer does increase the growth rate.The result is statistically significant, which implies that spraying the corn plants with the new type of fertilizer does not increase the growth rate.The result is not statistically significant, which implies that this result could be due to random chance. Which of the following was a typical tactic of nativists in the early 1900s?A. Registering immigrants to voteB. Campaigning for pro-immigration lawsC. Bullying and intimidating immigrantsD. Paying immigrants to move out of cities