Answer:
B: 11 minutes.
Step-by-step explanation:
So, we know that the machine prints at a constant rate.
After 3 minutes, the machine prints 108 posters.
So, let’s find the <em>unit rate. </em>We will divide the output over the input. So:

So, the unit rate of the machine is 36 posters per minute.
We can write an equation. If t represent the number of minutes and p represent the amount of posters, then:

Gives the amount of posters p and t minutes.
We want to know how long it will take Jeffrey to make 396 posters.
So, we can substitute 396 for p and solve for t. Hence:

Divide both sides by 36:

Therefore, it will take Jeffrey 11 minutes to make 396 posters.
The compound interest will be equal to $13.57.
<h3>What is compound interest?</h3>
The interest on a loan or deposit that accrues on both the initial principal and the accumulated interest from prior periods is known as compound interest.
The compound interest will be calculated by:-


CI = $13.57
Therefore the compound interest will be equal to $13.57.
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80.55
5 rounds up so 80.6 is 80.55 rounded to the nearest tenth.
-7 and 1/7
hope this helps!!