Question 1089307

I am in MAT 104. I've never had algebra.  I just started circles and I think Im missing a step in the formula.  I've tried several problems and they are all wrong. To get the area I am using A=nr(exponent) 2 don't know how to make the 2 in the air. one of the problems is n=3.14 r= 8ft  I multiplied 3.14x8 to the second I got the area is 200.96.  To get circumfrence I used 2nr formula so I multiplied 2x3.14x8 =50.24. I got it wrong. Am I missing a step? Or leaving a step out? 
<pre>First of all, were you instructed to use {{{matrix(1,3, 3.14, for, pi)}}}?
Second, were you asked to give your answer to a certain decimal place?
These could be the differences between you getting the answers correct or incorrect.