Question

A circular plate has a circumference of 16.3 inches. What is the area of this plate? Use 3.14. Round th the nearest whole number.

Answer 1

Circumference: C = 2πr = 16.3

2(3.14)r = 16.3

r = 16.3/6.28

r = 2.5955414

Area: A = πr^2

A = 3.14(2.5955414)^2

A = 21.15366242 in^2

Rounded to nearest whole number the area is 21 in^2
The answer is 21 in^2

Note-(if you see like this ^2 = it is exponent 2 or power 2)