Question

http://prntscr.com/6ci5ev

Answer 1

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Answer 2

it should be 16

Answer 3

pi

Answer 4

i cant help sowwy

Answer 5

did it work?

Answer 6

it should be 8pi

Answer 7

\[\because 2\rho \mathbb{R}= \rho D\]

Answer 8

no rpir^2

Answer 9

Fail^ cx

Answer 10

@gokuporter
Hi!

You need to look up the equation for the circumference of a circle, then insert the values they gave you. I will not give you the answer because this is one of the most basic geometric procedures there are and if you don't figure it out on your own and make the concept "part of you", you are going to have a very rough life in math. Please look up the equation, replace the values, and plug and chug! You can do this! :o)

Answer 11

Remember pi*radius^2. the radius is half of the diameter. 8/2=r