How to calculate pi without a calculator?

Science & Mathematics by Anonymous 2018-09-20 05:08:51

Social Science

No response

The math problem I was working says... A circle has a radius of 7. What is the area of the circle? (A) 38.5 (B)44 (C)154 (D)616 Pi=3.14 right? So I multilpied 3.14 by 49 and got 153.86, but its not in the answer choices so how do i get the answer manually b/c i cant use calculators on the upcoming test i got