Answer:
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Step-by-step explanation:
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In order to find the circumference, we first need to find the radius. We have the area, so we can find the radius. We set up this equation:

We begin by dividing both sides by pi.
483.76 =

Next, we take the square root of both sides to get the radius.
r = 22.
Next, we plug this into the formula for the circumference, 2 pi r

So, the circumference of this circle is 138.23 units.
Answer:
12 hours a month
Step-by-step explanation:
No.of hours the teacher can tutor a month = 420/ 35
= 60/5 {giving by 7th table}
= 12 hours
9(3)-4
27-4
3 your answer is 3
Then the side length is 9 inches if the area is 81 square inches.