each child to one of four treatment groups. Each treatment group has a specific amount of screen time during a one-week time frame. The

first group has no screen time, the second group has two hours of screen time, the third group has four hours of screen time, and the fourth

group has six hours of screen time,

After the first week, the scientists conduct the same experiment, with the same subject groups, for three more weeks so that each group

experiences each of the four treatments.

Which statements about this study are true?

This study uses blinding.

This study uses random sampling

This study uses a control group.

ооо

This study uses blocking.

This study uses a repeated measures design.

The **statements **that are **true **about this **study **are:

**Random sampling** occurs when each sample has an **equal **probability of being chosen in a study.

This is seen in the **random **selection of **100 **children. The **Control **group was used with the **first **group that had **no screen **time.

The **repeated measures design **was also used when **multiple **measurements were taken during **different **weeks.

Learn more about **experiments **here:

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You have been asked to analyze the popcorn recipes of three different local theatres in order to figure out which theatre has the best popcorn. In this case, the "best" popcorn is the most buttery! In your quest to find the best, you meet with each theatre manager individually and ask for the ratio of oil to popcorn kernels that they use in their recipes. Here are their responses.

The manager of Theatre A says that they usually go through about 15 cups of popcorn kernels and about 5 cups of oil each weeknight.

The manager of Theatre B says that they order 18 cups of oil and 72 cups of popcorn kernels each week.

The manager of Theatre C says that their concessions use 6 cups of oil and 32 cups of popcorn kernels on a busy Saturday.

You also ask about the amount of salt each theatre uses in their recipe. Their responses are below.

Theatre A uses 2 cups of salt for every 10 cups of oil.

Theatre B uses cup salt for every cup of oil.

Theatre C uses 1 cup of salt for every 6 cups of oil.

For each of the following ratio problems, use a double number line or an equation to solve. Type your answers as numbers.

If Theatre A uses 27 cups of popcorn kernels, how many cups of oil will they use?

_____cups

**Answer: The ratio value of oil to popcorn kernels for theatre C is 6 / 32 = 3 / 16.**

**Step-by-step explanation: Given that the manager of Theatre A says that they usually go through about 15 cups of popcorn kernels and about 5 cups of oil each weeknight.**

**Then, the ratio value of oil to popcorn kernels for theatre A is 5 / 15 = 1 / 5.**

**Given that the manager of Theatre B says that they order 18 cups of oil and 72 cups of popcorn kernels each week.**

**Then, the ratio value of oil to popcorn kernels for theatre B is 18 / 72 = 1 / 4.**

**Given that the manager of Theatre C says that their concessions use 6 cups of oil and 32 cups of popcorn kernels on a busy Saturday.**

**Then, the ratio value of oil to popcorn kernels for theatre C is 6 / 32 = 3 / 16.**

2^x+2=4. yall i got this problem and i dont rlly understand how to do it. Hope yall can help me:)))))))))))))))

**Answer:**

[tex]x=1[/tex]

**Step-by-step explanation:**

Ok, so we start off with [tex]2^x+2=4[/tex]

Then, we subtract 2 from both sides so that becomes: [tex]2^x+2-2=4-2[/tex]

After that, we simplify to get: [tex]2^x=2[/tex]

Finally, the solution becomes: [tex]x=1[/tex]

**Answer:**

x=1

**Step-by-step explanation:**

2^x=4-2

2^x=2

2^x=2^1

x=1

Which equation represents this statement?

The product of 1/5 and a number is equal to 1/1 2.

1/5n=1/1 2

1/5÷n=1/1 2

1/5−n=1/1 2

1/5+n=1/1 2

**Answer:**

answer is B

**Step-by-step explanation:**

How do I solve this? 2(-2w-1.2+7x)

-4w-2.4+14x this is the answer for this

Anna categorized her spending for this month into four categories: Rent, Food, Fun, and Other.

If Anna spent a total of $2900 this month, how much did she spend on Rent?

**Answer:**

.26 * 2900= 754 dollars

**Step-by-step explanation:**

I'm not sure if it's right.

The town of Winchester recently built an artificial body of Vater. This reservoir will store drinking water for the

town. Which of the following could cause contamination of the water and lead to human health-related problems

and loss of native species?

development of a water quality plan

B building a fence around the reservoir

C improvements to a water treatment facility

increased use of pesticides (chemicals) by farmers within the local watershed

**Answer:**

This reservoir, will store drinking water for the town. Which of the following could cause contamination of the water and lead to human health-related problems and loss of native species? ... Air pollution can affect human health and the health of other living things.

**Step-by-step explanation:**

3(x+9)-4x=11x-13x+23

**Answer:**

[tex]\huge\boxed{x=-4}[/tex]

**Step-by-step explanation:**

[tex]3(x+9)-4x=11x-13x+23\\\\(3)(x)+(3)(9)-4x=(11x-13x)+23\\\\3x+27-4x=-2x+23\\\\(3x-4x)+27=-2x+23\\\\-x+27=-2x+23\qquad|\text{subtrsact 27 from both sides}\\\\-x=-2x-4\qquad|\text{add}\ 2x\ \text{to both sides}\\\\x=-4[/tex]

Does 28/4 have a remainder

No but it equals to 7 :)

Remainder=0

Quotient=7

Thanks!!

I am confused, can someone help me

**Answer:**

bc=10

**Step-by-step explanation:**

12/bc=18/(33-18)

12/bc=18/15

18bc=12*15

18bc=180

bc=180/18

bc=10

I WILL GIVE BRAINLEST HURRY PLEASE ITS DUE RIGHT NOW HURRY PLEASE plssss help me if your good at finding area in shapes plsss

45x10x15=6,750 is the answer

a tube has a radius of 4 inches and a height of 4 inches. what's its approximate volume?

**Step-by-step explanation:**

that is the same as the volume of a cylinder :

pi×r²×height = pi×4²×4 = pi×64 = 201.0619298... in³

≈ 201 in³

**Volume **is a three-dimensional **scalar **quantity. The **volume **of the tube is **201.0619 inches³.**

A **volume **is a scalar number that **expresses **the amount of three-dimensional **space **enclosed by a **closed surface.**

The **volume **of a **cylinder **is given by the formula as shown below,

Volume of a **cylinder **= πr²h

where r is the **radius **of the cylinder while h is the **height **of the cylinder.

Given that a **tube **has a **radius **of 4 inches and a **height **of 4 inches. Therefore, the volume of the tube will be,

The **volume **of the tube = π × R² × h

= π × (4 inches)² × (4 inches)

= 64π inches³

= 201.0619 inches³

Hence, the **volume **of the tube is **201.0619 inches³.**

Learn more about** Volume:**

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A middle school had a school spirit day. In one class the ratio of students who wore school colors to the number of students who didn’t was 8 to 5. Ten students didn’t wear school colors

**Answer:**

**Step-by-step explanation:**

2. Harry puts $5 in his piggy bank every

week. What type of slope does this

scenario describe? Explain.

**Answer:**

linear

**Step-by-step explanation:**

**Answer:**

Linear slope of 5/1

**Step-by-step explanation:**

The rate is constant.

Hope that helps

3. Tom's entered a snowman building contest in which the person who builds the tallest

snowman wins. Currently, the record is 13.4 feet high. If Tom's snowman is currently 9 feet

high, how many more feet does he need to build on, in order to win the competition

tom's snowman has to increase by anything greater than 4.4 ft

**Answer:**

4.5 feet

**Step-by-step explanation:**

9+4.5=13.5

13.5>13.4

CAN SOMEONE HELP ME WITH THIS?

**Answer:**

d

**Step-by-step explanation:**

Which expression is equivalent to (6x + 12)?

Answer:

2(3x + 6)

Step-by-step explanation:

What is the end behavior of the function f(x)=−3/4x^2?

**Answer:**

[tex]f(x)\longrightarrow-\infty[/tex], as [tex]x\longrightarrow+\infty[/tex]

**Step-by-step explanation:**

We can see that the larger the input, the smaller the output

If a rectangle has a base of 6' and a height of 4' its area would be what?

A= bxh

A= 6'x4'

A= 24 sq.ft.

24 sq.ft. Is the answer if not then I’m sorry

Which ordered pair (a, b) is the solution to the given system?

2a-5b=1

3a+5b=14

(1, 3)

(3, 1)

(29/5,15)

15,29/5

**Answer:**

2a - 5b = 1

3a + 5b = 14

Let's solve this system using elimination. Add the equations together to cancel the b-terms, then solve for a.

2a - 5b = 1

3a + 5b = 14

+___________

5a - 0 = 15

5a = 15

a = 3

Next, plug 3 for a into either of the equations and solve for b.

2a - 5b = 1

2(3) - 5b = 1

6 - 5b = 1

- 5b = -5

b = 1

Lastly, check all work by plugging both values for their respective variables.

2a - 5b = 1

2(3) - 5(1) = 1

6 - 5 = 1 -- This is true

3a + 5b = 14

3(3) + 5(1) = 14

9 + 5 = 14 -- This is true

The solution to the system of equations is (3, 1).

**Step-by-step explanation:**

**Answer:**

b

**Step-by-step explanation:**

if I set off for the market,a distance of 11km at 10am. And walk at an average speed of 3km per hour,At what time will I reach the market?

**Answer****:**

At 1:40 pm you will reach the market.

**Step-by-step explanation:**

Distance (d) = 11 km

Average speed (v) = 3 km/h

Formula:

[tex] \rm Average \: speed = \dfrac{Distance}{Time} \\ \\ \rm 3 = \dfrac{11}{t} \\ \\ \rm t = \dfrac{11}{3} \\ \\ \rm t = 3 \frac{2}{3} \\ \\ \rm t = 3 hr \: 40min[/tex]

It will take 3 hours 40 minutes to reach the market.

So, if you set off for the market at 10 am you will reach market by 1:40 pm (10 am + 3hr 40min).

If △CFE≅△PTR, complete each of the following statements:

CE¯¯¯¯¯¯¯¯ ≅

TR¯¯¯¯¯¯¯ ≅

∠P ≅∠

∠F ≅∠

△FEC ≅△

△RPT ≅△

Based on the definition of **congruent triangles**, the statements will be completed as follows:

*Recall the following about **Congruent Triangles:*

*Given that △CFE≅△PTR, thus:*

Thus, based on the definition of **congruent triangles**, the statements will be completed as follows:

Learn more about **congruent triangles** on:]

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Only 19 and 21!!!!!

Thank You!!!!

**Step-by-step explanation:**

19. 4x² - 13x + 3

4x² - 1x - 12x + 3

x(4x - 1) -3(4x - 1)

x-3 4x-1

Ok done. Thank to me:>

Name.

Solve using

Substitution

L

y = 3x + 2

6x - 2y = 8

**Answer:**

No solution

**Step-by-step explanation:**

There is no solution to the system of equations y=3x+2 and 6x-2y=8, meaning that they are parallel to each other on a graph, with no points ever intersecting on each other's lines.

is ( -5, 6) ( -2, 0) ( 0, 6) ( 0, 2) ( 1, -3) a function

**Answer:**

No

**Step-by-step explanation:**

No, ( -5, 6) ( -2, 0) ( 0, 6) ( 0, 2) ( 1, -3) do not make up a function. It does not pass the vertical line test when graphed, as there are 2 points, (-5, 6), and (0, 6), that lines up on the same y-value.

Work out the area of the shaded shape.

**Answer:**

61 m²

**Step-by-step explanation:**

Find the area of the whole rectangle and subtract the part that is cut off

Area = [tex]11 *8 - 9 *(8-5)[/tex]

= [tex]88 - 9*3[/tex]

= [tex]88 - 27[/tex]

= [tex]61[/tex]

Units = m * m or m²

61 m²

-Chetan K

3

Evaluate the function f(x) = (x + 2)2 for the given inputs.

a. f(5)=

b. f(-3) =

c. f (x+3) =

**Answer:**

a. 49

b. 1

c. x^2+10x+25

**Step-by-step explanation:**

Symply substitute the values (5, -3, x+3) in the equation (x+2)^2

What is the volume of a cylinder with a height of 13 and radius 6?

1470.27

v = pi r^2 (H)

v = 3.14 (6^2) (13)

v = 3.14 (36) (13)

v = 1470.27 (about)

**Answer:**

V = 1470

**Step-by-step explanation:**

V = πr²h

V = (3.14)(6²)(13)

V = (3.14)(36)(13)

V = 1469.52

WHAT PERCENT OF 200 IS 28???? HELP MEEEEEE!!!!!!!!!

**Answer:**

14%

**Step-by-step explanation:**

Find the quotient of 29 and 200.

[tex]\frac{28}{200}=0.14[/tex]

Therefore, 28 is 14% of 200.

The **number **28 is 14% of the number 200.

What is the percentage?

The **percentage **is defined as representing any number with **respect **to 100. It is denoted by the sign %. The percentage stands for "out of 100." Imagine any measurement or object being divided into 100 equal bits.

Given that the **number **is 200 and 28 is what percent of 200 will be calculated as:-

The percentage will be calculated as:-

200 x (X)% = 28

X% = ( 28 x 100) / 200

X% = 14%

Therefore, the **number **28 is 14% of the number 200.

To know more about **percentages **follow

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Nick drives 7 miles in ten minutes how many miles would nick drive if he drove at the same rate for 2 hours?

**Answer 84 miles**

**Step-by-step explanation:**

**2hrs= 120min**

**7 miles/ 10 min = x miles/ 120 min**

**x = 84 miles**

Answer:

84 miles

Explanation:

2 hours = 120 minutes

120 / 10 = 12

12 x 7 = 84

84 miles

Explanation:

2 hours = 120 minutes

120 / 10 = 12

12 x 7 = 84

Find the midpoint of Segment AB if A (-5, 6) and B(1.-3).

Midpoint Formula: (X: + X2, Y + y2)

2 2

**Answer:**

(-2, 1.5)

**Step-by-step explanation:**

x-coordinate = ½(1 - 5) = -2

y-coordinate = ½(-3 + 6) = 1.5

Solve for X Enter the answer only with no spaces between numbers, symbols, and or variables
Algn jefazo:)))))))))))
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