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ExtremeBDS [4]
3 years ago
10

Determine whether the study depicts an observational study or an experiment.

Mathematics
1 answer:
USPshnik [31]3 years ago
6 0

Answer:

Option c

Step-by-step explanation:

The study is an observational study. An observational study is made when the researchers collect data based on what they see, hear or observe without any form of manipulation or treatment plan from the researchers. Thus, in this case, the study is an observational study because the study examines individuals in a sample, but does not try to influence the response variable/influence their responses.

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How do you know that the sum of 7-1g and 7-2 is rational?
user100 [1]

The sum of 7-1 and 7-2 will be a rational number because sum of rational numbers is a rational numbers.

A rational number is a number which can be written in p/q form where q≠0.

We know that when two rational numbers is added then the sum is also a rational number. And when two rational numbers are subtracted then the difference is also a rational number.

So in the given question, lets study the term differently that is,

i) 7 - 1 is a rational number because their difference is equal to 6 and it can be written in p/q form which is 6/1.

ii) 7 – 2 is also a rational number as their difference will be 5 which is a rational and can be written in p/q form which is 5/1.

So when these two rational numbers are added their sum will also be a rational number which is 11.

Learn more about rational numbers here : brainly.com/question/12088221

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5 0
1 year ago
The total surface area of a right circular cylinder is 84 pie cm square and the altitude is 11 cm .find the radius of the base​
djyliett [7]

Answer:

use the formula r = square root of (V / (pi x h))

8 0
2 years ago
Read 2 more answers
volunteers collected non perishable food items and packed 14 items per box. If the volunteers collected a total fo 200 items, ho
klio [65]
Do 200/14 and get 14.2857142857 so about 14 boxes
5 0
1 year ago
I NEED HELP ON QUESTION B AND C ASAP.
ipn [44]

Answer:

  • See below

Step-by-step explanation:

<h3>Part B</h3>

Assumed the dimensions of the top and bottom parts are identical.

Since the cylindrical part has total height of 1.8 cm and the hemisphere volume is transferred to bottom part and the cone part is still full, the value of h is the difference of the total height of cylinder and full part of the top section of cylinder:

  • h = 1.8 cm - 0.3 cm = 1.5 cm
<h3>Part C</h3>

Find the volume of sand in the bottom part. It consists of a hemisphere and a cylinder of 1.5 cm height.

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  • V(hemisphere) = 2/3πr³ = 2/3*3.14*(2.6/2)³ ≈ 4.6 cm³

<u>Total sand in the bottom part:</u>

  • 7.96 + 4.6 = 12.56 cm³

<u>Time taken:</u>

  • 12.56 / 0.05 = 251.2 seconds = 4 min 11.2 seconds
8 0
2 years ago
I JUST NEED A YES OR NO ANSWER IS THIS RIGHT​
andrezito [222]

Answer:

no it's not correct it's wrong

8 0
3 years ago
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