Algebra
posted by Jordan on .
The Circumference and area of a circle of radius r are givin by 2 [pie] r and [pie] r[2], respectively use 3.14 for the constant [pie]
A. What is the circumference of a circle with a radius of 2 m?
B.What is the area of a circle with a radius of 2 m?
C. The earth has a radius of about 3960 miles. Approximately how long is the equator?

Solve these problems.
A. C = 2*2*3.14
B. A = 3.14*2*3.14*2
C. C = 3.14*2*3960
We'll be glad to check your answers. 
A. C = 12.14?
B. A = 18.84. 28?
C. C = 24868.8? 
A. Please do the multiplication again. You're close but not right.
B. I mistyped the formula above. It should be:
A = 3.14*2*2
C. You're right! :) 
A. C= 12.56
B. A= 12.56
C. Alright! 
Yay! You have all of them right now. The only addition is that the answer to B is 12.56 square meters.