Answer:

Step-by-step explanation:
Definition of negative exponent:

In our case, a = 3 and -n = -2.

Now we just evaluate the power in the denominator.

I’m not good at maths thank me later
Circumference =

When you plug that in you should have

Solve that and you have your answer(: I would recommend rounding to the nearest hundreth
Um I have no idea what this is but good luck
17-(28÷4)+(5)x2 equals 20.