Question

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Answer 1

A for the first one yes
http://www.wolframalpha.com/input/?i=2*1.5^2*pi%2B20*pi*3

Answer 2

C for the second one
http://www.wolframalpha.com/input/?i=2*pi*64%2Bpi*64

Answer 3

lol you always get these right

Answer 4

A for the last one

Answer 5

like you said, smarty

Answer 6

:) You see that wasn't so hard!?
@satellite73 Did you just guess on the last one? lol

Answer 7

no i did not
the area goes with the square
since on radius is twice the other the corresponding area is four time the other

Answer 8

ok actually i did guess

Answer 9

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@amistre64 May you check my answer please ?

Answer 10

just kidding dear
it is right