5 stars easy

A physician is testing the effectiveness of wo new exercise plans on 70 subjects. To assign the subjects to the two treatment groups, he writes "Plan 1" on one stip of paper and "Plan 2" on another slip of paper. He randomly picks one of the slips, and assigns the first 35 subjects who signed up to that plan, and assigns the last 35 subjects to the other plan. Select the statement that best describes the composition of the treatment groups.

The treatment groups might not be comparable, because there is not a control group

The treatment groups should be comparable, because there are a large number of subjects in each group.

The treatment groups should be comparable, because the exercise plan for each group was randomly selected

The treatment groups might not be comparable, because the first 35 subjects to sign up for the study might share a characteristic related to exercise, such as high motivation. ​

Answer:

0

Step-by-step explanation:

According to  PEMDAS: parenthesis, exponents, multiplication, division, addition, subtraction

Do we have parenthesis? NO

Do we have exponents? YES 10^3=10x10x10=1,000

Are new expression is 8x1,000x

Do we have multiplication? Yes 8x1,000=8,000

Are new expression is 8,000x

Answer:

3x+2+36=110

3x= 110-38= 72

x= 72/3=24

Step-by-step explanation:

Answer:

Answer is 50cc Number D

Step-by-step explanation:

Answer:

50

Step-by-step explanation:

3.4.2

Answer:

(In order 1-17)

C,A,D,A,A,D,C,I,C,D,C,I,A,I,I,C,A

Step-by-step explanation:

A=Associative

D=Distributive

I= Identity

C=Commutative

Answer:

the first option

Step-by-step explanation:

Answer: x < 4

Step-by-step explanation: To plot an inequality, find the number and go the way the sign is pointing.

In this problem...

The less than sign is pointing left, and the number is 4. We use an open circle because the sign is not equal to. If it was, we would of put a closed circle.

<, or > = Open circle (Not shaded)

≤, or ≥ = Closed circle (Shaded)

I attached a image to proof the answer is correct.

Let me know if you have any questions.

~ Lily, from Brainly.

Answer:

if it increases 8% each year, the next year it's not 8% of the original, but 8% of the 108% and so forth.

The increase after 10 years is (108%)^10 - 100% which is bigger than 80%.

If the value of a stock increases by 8% each year, then, that is not equal to the value of a stock increases 80% each decade.

The degree to which a value increases expressed in percent form is known as percentage increase.

Given that, The value of a stock increases by 8% each year.

a) If it increases 8% each year, the next year it's not 8% of the original, but 8% of the 108% and so forth, the incasement in percentage is an exponential increase not a linear increase, so we can't say that, the value of the stock increases 80% each decade

b) Since,  (108%)¹⁰ > 80%

Hence, the increase after 10 years is (108%)¹⁰, will be bigger than 80%.

Hence, If the value of a stock increases by 8% each year then, that is not equal to the value of a stock increases 80% each decade

For more references on percentage increase, click;

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Answer:

A) 2nd quadrant

B) 2th quadrant

Step-by-step explanation:

hope this helps have a nice day!!

Answer:

1. 70.84

2. 144.75

3. 147.89

4.295.89

Answer:

3x + y = 20 and x - 2y = - 4

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

(a)

Given

3x + y = 17 ( subtract 3x from both sides )

y = - 3x + 17 ← in slope- intercept form

with slope m = - 3

Para;;el lines have equal slopes , then

y = - 3x + c ← is the partial equation

To find c substitute (4, 8) into the partial equation

8 = - 12 + c ⇒ c = 8 + 12 = 20

y = - 3x + 20 ← in slope- intercept form

Add 3x to both sides

3x + y = 20 ← in standard form

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

(b)

Given

y + 2x = 13 ( subtract 2x from both sides )

y = - 2x + 13 ← in slope- intercept form

with slope m = - 2

Given a line with slope m then the slope of a line perpendicular to it is

[tex]m_{perpendicular}[/tex] = - [tex]\frac{1}{m}[/tex] = - [tex]\frac{1}{-2}[/tex] = [tex]\frac{1}{2}[/tex] , then

y = [tex]\frac{1}{2}[/tex] x + c ← is the partial equation

To find c substitute (2, 3) into the partial equation

3 = 1 + c ⇒ c = 3 - 1 = 2

y = [tex]\frac{1}{2}[/tex] x + 2 ← in slope- intercept form

Multiply through by 2 to clear the fraction

2y = x + 4

x - 2y = - 4 ← in standard form

Answer:

1005.3 ft³

Step-by-step explanation:

cylinder has a base diameter of 8ft and a height of 20ft. What is it's volume in cubic ft, to the nearest 10th place?

Given that:

Base diameter = 8feets

Radius, r = 8/2 = 4 feets

Height h, = 20 feets

Volume of cylinder, V = πr²h

V = π * 4² * 20

V = π * 16 * 20

V = 1005.3096

V = 1005.3096 ft³

Answer:

Step-by-step explanation:

[tex]S^{2}[/tex]  is   ( [tex]q^{2}[/tex][tex]r^{3}[/tex])^2

then

A = [tex]q^{2*2}[/tex][tex]r^{3*2}[/tex]

A = [tex]q^{4}[/tex][tex]r^{6}[/tex]

this looks much better   than r^ some big number :D  

Answer:

C

Step-by-step explanation:

Answer: Total number of pages is 125

Step-by-step explanation:

If 3/5 of a book is equal to 75, we can conquer that 1/5 of the book is 25 pages, because 75/3=25.

With this we can do 25 x 5 = 125 total pages.

Answer:

I belive the answer would be the first one. 2^28 x 3^20 x 9^4

Step-by-step explanation:

This is becasue you need to multiply the power on the outside of the parenthesis, (4).     7 times itself 4 times is 28, 5 times itself 4 times is 20, and then use the 4 for the 9. Hope this helps!

Answer:

nice

Step-by-step explanation:

Answer: -14

(− 1/ 3 )(12+30)

=  −1 /3 (12+30)

=  −1/ 3 (42)

= −14

Answer:

I answered this on accident sorry

Step-by-step explanation:

Answer:

in 2.5 hours the bird will fly 150 miles

Step-by-step explanation:

take 60 mins and divide it into 4(=15) take 15 and multiply it by 10 leaving 150 miles in 2hours and 30 minutes

9514 1404 393

Answer:

  no solution

Step-by-step explanation:

The discriminant is ...

  b^2 -4ac = (-4)^2 -4(2)(16) = 16 -128 = -112

A negative discriminant means there are no real solutions to the equation.

_____

The complex solutions are 1±i√7.

If we assume the equation has a typographical error and is intended to be ...

  2x^2 -4x -16 = 0

The solutions are x = -2 and x = 4.

Answer:

13

Step-by-step explanation:

Answer:

They are the same

Step-by-step explanation:

Answer:

B. θ(t)= 6 cos (2π/3 t)

Step-by-step explanation:

Answer:

B) theta(t)= 6cos (2pi/3 t)

I’m not sure how to explain how I got the answer, but I did get it wrong and B was marked right. I hope this helps!

Answer: Your answer is "Water based vascular system"

Answer:

"Water based vascular system"

Step-by-step explanation:

i got it right

Answer:

(x+1)(x-3)

Step-by-step explanation:

i hope this helps :)

Answer:

he bought 36 hot dogs

4 packs of hot dogs

3 packs of buns

Step-by-step explanation:

Answer:

He bought 36 hot dogs,4 packs of them, and 3 packs of buns

Step-by-step explanation:

The LCM (least common multiple) of 9 and 12 is 36 and 12*3=36 and 9*4=36 so they are even

Answer:

200 ft²

Step-by-step explanation:

area = 1/2(BH) = 1/2(20)(20) = 200 ft²

Answer:

length would be 15 inches, width would be 9.36 inches and the scale would these numbers divided by the number of feet on the original scale... not sure if its correct

Answer:

A ∝ BCD or A = kBCD (k = constant ), then A varies jointly as B, C and D.

Step-by-step explanation:

The value of 'w' when x = 4 and y = 3 is, 40.

In its most basic form, a ratio is a comparison between two comparable quantities.

There are two types of proportions One is the direct proportion, whereby increasing one number by a constant k also increases the other quantity by the same constant k, and vice versa.

If one quantity is increased by a constant k, the other will decrease by the same constant k in the case of inverse proportion, and vice versa.

Given, The value of w varies jointly with x and y.

Let, w ∝ xy ⇒ w = kxy.

5 = k×(3/4)×2.

5 = (3/2)k.

k = 10/3.

Now, x = 4 and y = 3.

Therefore,

w = (10/3)×4×3.

w = 40.

learn more about proportion here :

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Answer:

yes

Step-by-step explanation:

can i have brainliest

Answer:

8y(3x - 2)

Step-by-step explanation:

8y is the GCF so I divided it out and set it outside the parenthesis.

Answer:

25.1 ft

Step-by-step explanation:

To solve for circumference is pretty simple. Just use the equation 2pi r (r=radius, radius is diameter divided by 2).

So essentially, apply to your calculator:

2(3.14)4=25.12

pretty simple! hope this helps!