The director of a community recreation center conducted a six-week study to examine the effects of four types of exercise—strength training, flexibility training, aerobics, and jogging—on maximal oxygen consumption. From the 40
members who participated, the director randomly assigned 10 members to each exercise type. Maximal oxygen consumption was measured for each member at the beginning of the study and again at the end of the six weeks. The director examined the change in maximal oxygen consumption for each member. Which of the following statements is a correct description of a feature of the study?
a. The study has replication because there are four types of exercise.
b. The study has replication because it was conducted over a six-week period.
c. The response variable is the type of exercise with the greatest change in maximal oxygen consumption.
d. The treatments in the study are strength training, flexibility training, aerobics, and jogging.
e. The experimental units are the four different types of exercise.

Answer:

The speed will be "144 mph".

Step-by-step explanation:

Let the speed of the plane be "x mph".

then,

The car's speed be "x-130 mph".

According to the question,

⇒ [tex]\frac{1440}{x} =\frac{400}{x-130}[/tex]

By applying cross-multiplication, we get

⇒    [tex]1440(x-130)=400x[/tex]

⇒ [tex]1440x-187200=400x[/tex]

⇒    [tex]1440x-140x=187200[/tex]

⇒                [tex]1300x=187200[/tex]

⇒                       [tex]x=\frac{187200}{1300}[/tex]

⇒                          [tex]=144 \ mph[/tex]

Answer:

19,2049.12

Step-by-step explanation:

By

Step-by-step explanation:

answer: 3/4 or 0.75

=5 1/4 - 4 1/2

=21/4 - 9/2

= (21-9) / 4

=3/4  or 0.75

Answer:

A. An angle measuring 125°

Step-by-step explanation:

An obtuse angle is a type of angle that is always larger than 90° but less than 180°. In other words, it lies between 90° and 180°

Answer:

Option B

Step-by-step explanation:

Expression representing the series is,

[tex]\sum_{k=6}^{11}(2k+5)[/tex]

Here, k = Number of terms

By placing k = 6, 7, 8, 9, 10, 11 in the expression we can get the terms of the series.

For k = 6,

(2k + 5) = 2(6) + 5

            = 17

For k = 7,

(2k + 5) = 2(7) + 5

             = 19

For k = 8,

(2k + 5) = 2(8) + 5

            = 21

For k = 9,

(2k + 5) = 2(9) + 5

            = 23

For k = 10,

0(2k + 5) = 2(10) + 5

            = 25

For k = 11,

(2k + 5) = 2(11) + 5

            = 27

Therefore, expanded form will be,

17, 19, 21, 23, 25, 27

There, is a common difference in each successive to previous term,

d = 19 - 17

d = 2

Number of terms 'n' = 6

First term = 17

Sum of an arithmetic sequence is given by,

[tex]S=\frac{n}{2}[2a+(n-1)d][/tex]

Therefore, sum of the given sequence will be,

[tex]S=\frac{6}{2}[2(17)+(6-1)2][/tex]

   = 3(34 + 10)

S = 132

Option B will be the correct option.

Answer:

done

Step-by-step explanation:

Answer:

5/10k - 3/5

Step-by-step explanation:

by fraction we know about LCM

2/5k + 1/10k - 3/5

5/10k-3/5

Answer:

B. 150

Step-by-step explanation:

1 meter = 100 centimeters

since there is 30 meters x 100 centimeters = 3000 centimeters

then divde by 20 centimeters since that is the cost to make 1 bow so

3000 / 20 = 150.

So 150 bows in total.

Answer:

the answer would be a

Step-by-step explanation:

Answer:

36

Step-by-step explanation:

just got it correct

Answer:

3x+88+x+36+2x-10=180 (being straight line)

6x+114=180

6x=180-114

x=66/6

x=11

Step-by-step explanation:

Answer:

this question is very simple

we know that

if A , O and B lie on a straight line segment

then

∡AOY+∡YOZ+∡ZOB=180°

so

3x+x+x=180-----> 5x=180--------> x=180/5--------> x=36°

the answer is

x=36°

.... please mark as brainliest

Answer: a^3 · a^2 ≠ a^6 as the laws of exponents states that the multiplication rule for two exponents with the same bases equates to addition, so that a^3 · a^2 = a^3+2 = a^5.

Answer:

2.263

Step-by-step explanation:

standard deviation of sample means = s/\sqrt{n}

Given

Standard deviation s = 16pounds

Sample size n = 50

Substituting

standard deviation of sample means = 16/\sqrt{50}

standard deviation of sample means = 16/7.071

standard deviation of sample means = 2.263

Hence the standard deviation of sample means taken from this population with a sample size of 50 is 2.263

Answer:

[tex]Pr = \frac{1}{15}[/tex]

Step-by-step explanation:

Given

See attachment for sample space

Required

[tex]P(1\ Y\ and\ 1\ P)[/tex]

From the attached sample space, we have:

[tex]n(S) =30[/tex] ---- total outcomes

[tex]n(PY) = 2[/tex] --- outcomes with 1 Y and 1 P = 2 i.e. (P,Y) and (Y,P)

So, the required probability is:

[tex]Pr = \frac{n(PY)}{n(S)}[/tex]

[tex]Pr = \frac{2}{30}[/tex]

[tex]Pr = \frac{1}{15}[/tex]

The error is that; Carlos omitted the numerator

Answer:

1.) Yes,

2.) (10.0017518 ; 10.0022482)

Step-by-step explanation:

1.) Since the average is > mean, then it shows that scale isn't well calibrated.

2.)

Sample mean = 10.002

Standard Error = σ/√n = 0.0002/√5

df = n - 1 = 5 - 1 = 4

Tcritical(0.05, 4) = 2.776

Margin of Error = Tcritical * standard error

Margin of Error = 2.776*0.0002/√5 = 0.0002482

Confidence interval :

Mean ± margin of error

Lower boundary = 10.002 - 0.0002482 = 10.0017518

Upper boundary = 10.002 + 0.0002482 = 10.0022482

(10.0017518 ; 10.0022482)

C.)

Since 10 does not fall within the interval ; then we can agree with our assertion in (1).

Confidence interval gives a range of of all possible values and not just a single point value.

Answer:

[tex]D) y=-\frac{2}{3}x+ 2[/tex]

Step-by-step explanation:

[tex]Equation ~ of ~ the ~ line~ is ~ y=mx+b\\\\m= slope\\\\b=y-intercept[/tex]

[tex]to ~find ~ the ~ slope~ use ~ formula:-\\\\ slope=\frac{y_{2}-yx_{1} }{x_{2} -x_{1} } \\(0,2)(3,0)[/tex]

[tex]slope=\frac{0-2}{3-0}[/tex]

[tex]y-intercept ~ is (0,2) ~ so, b=2[/tex]

[tex]The ~ equation ~ of ~ the ~ line~ is:- \\[/tex]

[tex]y=-\frac{2}{3}x+2[/tex]

------------------------

hope it helps...

have a great day!!

Answer:

The price of a package of chocolate chip is $13.25

The price of a package of gingerbread is $17.18

Step-by-step explanation:

11x + 12y = 352

10x +8y = 270

Let "x" be the price of a package of chocolate chip.

Let "y" be the price of a package of gingerbread.

11x + 12y = 352(Multiply the 1st row by 10)

10x +8y = 270 (Multiply the 2nd row by 11)

-------------------

110x + 120y = 3520

110x +88y = 2970

--------------------------

        3y = 550

y =550/3

y = 17.1875

The price of a package of gingerbread "y" is $17.18

Let's pick the first equation "110x + 120y = 3520"

110x + 120y = 3520

110x+ 120(17.1875)= 3520

110x+2062.5=3520

110x=3520−2062.5

110x=1457.5

x= 1457.5/110

x=13.25

The price of a package of chocolate chip is $13.25

Then I'll definitely will ask you questions about maths :)

Please help me with my homework.

Here is the question. I hope you would help me, I really need answer asap. I need to pass it by 8:30. pls help me

Answer:

521,400 meters squared

Step-by-step explanation:

With the 1cm = 100m scale

6.6 cm = 660m

7.9 cm = 790m

Area = 660 x 790 = 521,400 meters squared

Answer:

−21r

Step-by-step explanation:

=−r+−20r

=(−r+−20r)

=−21r

=−21r

hope this helps!! <3

Answer:

a. true

b. false

c. false

d. true

e. false

Step-by-step explanation:

A. true, a shape is not warped by a rotation

b. false, the points on the figure will change

c. false, the size is not affected by a rotation

d. true, the orientation changes in a rotation

e. false, the coordinate points on the figure are altered

Answer:

A- The shapes of the figure does not change.

C- The size of the figure does not change.

D- The orientation of the figure does not change

The surface area of the regular pyramid whose diagram is good one above would be = 102.9 in²

To calculate the surface area of a regular pyramid, the formula given below is used;

Surface area of pyramid = SA = A + 3(1/2bh) = A + 3/2bh,

Where A = area of triangle = ½bh

b = base = 5 in

h = slant height = 13. in

SA = ½× 2.5×4.3 + 3/2×5 ×13

= 5.375 + 97.5

= 102.9 in²

Learn more about area here:

https://brainly.com/question/28020161

#SPJ1

Answer:

3/4 ib = 12 oz

Step-by-step explanation:

Answer:

Its a Parallelogram

It has all four descriptions.

Answer:

6390.56

Step-by-step explanation:

[tex]AV=PV(1+\frac{i}{n})^{nt}\\10000=x(1+\frac{.065}{2})^{7*2}\\10000=1.564807232*x\\6390.53=x[/tex]

9514 1404 393

Answer:

  $6490.57

Step-by-step explanation:

The future value is given by the compound interest formula ...

  A = P(1 +r/n)^(nt)

Principal P earns annual rate r compounded n times per year for t years.

Filling in the given values, we have ...

  10000 = P(1 +0.065/2)^(2·7) = P(1.0325^14)

  P = 10000/1.0325^14 ≈ 6390.5635

You would need to deposit $6390.57 into the account to have $10,000 in 7 years.

_____

Additional comment

Using the rounded-down result of the computation will result in a value after 7 years of $9,999.99, not quite $10,000. Rounding the computed value up to $6390.57 ensures the account balance will actually be $10,000.00 after 7 years.

If the balance is rounded to the nearest penny each time interest is added, then the balance after 7 years will be exactly $10,000.00. If there is no intermediate rounding, the resulting balance will be $10,000.01.

Most of the time, the answer key doesn't pay attention to details like this. Your expected answer may be $6390.56, or $6391 if rounded to dollars.

Answer:

63%

Step-by-step explanation:

2 dozen eggs is 24

24-9=15

15/24=.625 but when you rounded .63

Answer: 10 shirts

Step-by-step explanation: 8 shirts is $48, then 1 shirt is $6. $60 can buy 10 shirts.

Answer: 10

Step-by-step explanation:

48÷8 = 6

60÷6=10

Hope that helped! :)

Answer:

See answers below

Step-by-step explanation:

Since both trinagles asre similar hence the ratio of the similar sides are equal.

From both triangles;

y + 7 = 3y - 7

y - 3y = -7-7

-2y = -14

y = 14/2

y = 7

FE = 3y - 17

FE = 3(7) - 17

FE = 21 - 17

FE = 4

AB = y'+7

AB = 7 + 7

AB = 14

Similarly

3x+20 = 5x - 80

3x -5x = -80-20

-2x = -100

x = 100/2

x = 50

<A = 3x + 20

<A = 3(50) + 20

<A = 150 + 20

<A = 170degrees

Hence x= 50 and y = 7

Step-by-step explanation:

basketball = 40 %

football = 30 %

baseball = 20 %

soccer = 10 %

Answer:

90 seconds

Step-by-step explanation:

To find the time it takes to take a certain amount of steps, divide the given rate by the time.

3/2 = 1.5

This means she takes 1.5 steps every second. Now, we can multiply this rate by 60 to find how far she will go in that time.

1.5 · 60 = 90

Bethany takes 90 steps in 60 seconds.

I hope this helps ^^ Good luck

Answer:

Circumference is equal 6 pi and area is equal 9pi

Step-by-step explanation: