Question

What is the circumference and area of a circle with r=7., to the nearest of a unit ?

Answer 1

r = 7

Solving for the circumference first,
C = 2(π)(r)
C = 2(π)(7)
C = 14(π)
C = 43.96
You would need to round up to 44 then.

The area of a circle is
A = π(r²)
A = π(7²)
A = π(49)
A = 153.86
You would round up to 154.

Circumference = 44
Area = 154