A penny has diameter of about 26.5 millimeters. What is the area of a penny to the nearest hundredth? Use 3.14 for pi

The formula for the diameter of a circle is A=Pi (d/2) ^2. So you write 3.14 (26.5/2) ^2. 26.5 divided by 2 or in half is 13.25. 13.25 times 3.14 is approximately 41.61. 41.61 times 41.61 equals 1,731.3921. So the answer is 1,731.39 millimeters.

D=26.5 millimeters

r=13.25 millimeters

A = (pi) (r) ^2

A = (3.14) (13.25) ^2

A=551.27 millimeters squared