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stiv31 [10]
2 years ago
15

A researcher wants to investigate the effect of weather on college students' study habits. On a sunny day, the researcher sits i

n the quad and records the number of minutes each student puts into studying. The researcher finds that the mean number of minutes of study is 39.8. This is an example of a
Mathematics
1 answer:
LekaFEV [45]2 years ago
6 0

The investigation that was carried out by the researcher illustrates a one-shot case study.

<h3>What is a one-shot case study?</h3>

It should be noted that a one-shot case study simply means a research design where a single group is observed after experiencing some treatment on a single occasion.

Since the researcher sits in the quad and records the number of minutes each student puts into studying, it's a one-shot case study.

Here, the single group of individuals are selected for observation.

Learn more about case study on:

brainly.com/question/15164693

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A cylinder’s radius is reduced to 2004-06-01-04-00_files/i0480001.jpg its original size and the height is quadrupled. How has th
asambeis [7]
I can't answer this question if we don't know by what scale the cylinder's radius was reduced. Luckily, I found the same problem that says the radius was reduced to 2/5. So, we find the ratio of both volumes.

V₁ = πr₁²h₁
V₂ = πr₂²h₂

where r₂ = 2/5*r₁ and h₂ = 4h₁

V₂/V₁ = π(2/5*r₁ )²(4h₁)/πr₁²h₁= 8/5 or 1.6

<em>Thus, the volume has increased more by 60%.</em>
6 0
3 years ago
Given that $x \le -7,$ identify all the correct conclusions. (A) $3x \le -21.$ (B) $3x \ge -21.$ (C) $-3x \le 21.$ (D) $-3x \ge
exis [7]

Answer:

Options A and D are correct choices.

Step-by-step explanation:

We have been given an inequality x\leq -7 and we are asked to find the correct options from our given choices.

Let us solve inequalities in our given options one by one to see which of these matches with our given inequality.

(A) 3x\leq -21  

x\leq \frac{-21}{3}

x\leq -7

We can see that option A gives the same answer as our given inequality, therefore, option A is the correct choice.

(B) 3x\geq -21

x\geq \frac{-21}{3}

x\geq -7

This inequality represented in option C gives solution that x should be greater than or equal to -7, which is opposite to our given inequality, therefore, option B is incorrect.

(C) -3x\leq 21

Dividing inequality by a negative number swaps inequality sign.

x\geq \frac{21}{-3}

x\geq -7

This inequality gives solution that x should be greater than or equal to -7, which is opposite to our given inequality, therefore, option C is incorrect.

(D) -3x\geq 21  

Dividing inequality by a negative number swaps inequality sign.

x\leq \frac{21}{-3}

x\leq -7

We can see that option D gives the same answer as our given inequality, therefore, option D is the correct choice.  

8 0
3 years ago
Rita started baking at 7:45 AM and finished at 8:12 am. How long did it take her? Give your answer in minutes
Firdavs [7]
 The answer is 27 minutes long
7 0
2 years ago
Read 2 more answers
Given the following linear function sketch the graph of the function and find the domain and range.
loris [4]
Domain: (- infinity, infinity)
Range: (-infinity, infinity)

5 0
3 years ago
Jonah and his friends go apple picking. Jonah fills 5 baskets. Each basket holds 15 apples. If 4 of Jonah's friends pick the sam
____ [38]
Its easy just do 5x15=75 that's how much  Jonah has so far 
then another friend has 5 full baskets and each have 15 apples = 75
then again 5x15
then again 5x15
then again 5x15
then last again 5x15
so add 75 4 times = 375 Hope this helps :D
3 0
3 years ago
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