Question

Solving for Circumference of a Penny A penny is 1.9 cm wide. What is the circumference of a penny? Approximate using mc001-1.jpg = 3.14 and round the answer to the nearest tenth if necessary.

Answer 1

Hoi!

To solve this, let's use the formula $C = 2 \pi r$

C = Circumference
R = Radius - Since the radius is not explicitly stated, then divide the width (diameter) by 2.

Plug in the values.

$C = 3.14 * 0.95 * 2 5.9 = 3.14 * 0.95 * 2$

Your circumference is 5.9. :)

Answer 2

Wide is diameter 
to get radius 1.9/2 
then use a calculator with this formula 2(3.14)(1.9/2) 

or you can use (3.14)(diameter) the diameter was 1.9
so (3.14)(1.9)