By 32,760 different ways can a researcher select 4 rats from 15 rats and assign each to a different test .
<u>Step-by-step explanation:</u>
We need to find How many different ways can a researcher select 4 rats from 15 rats and assign each to a different test.Let's find out:
We will use Permutation here : As we will chose 4 rats out of 15 rats , order will be considered which will make this as a permutation problem . Formula for permutation is given by :
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According to question , we have
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Therefore , By 32,760 different ways can a researcher select 4 rats from 15 rats and assign each to a different test .
The answer is 37.5!
I just simply used a calculator!
Answer:
18 inches²
Step-by-step explanation:
The formula for the area of a rectangle is: 
Substitute the given values for the variables.

Therefore, the area of the rectangle is 18 inches².
<span>The factors of 18 are 1, 2, 3, 6, 9, 18.</span>
Answer:
Idk
Step-by-step explanation: