4. A circular aluminum sign has a radius of 28 centimeters. If a sheet of aluminum

costs $0.33 per square centimeter, how much will it cost to make the sign? Use

3.14 to approximate a.

The cost for making the sign is $812.38

Step-by-step explanation:

Radius = 28 cm

Cost of aluminum per square cm = $0.33

Area of the sign = π (r x r)

= (3.14) (28 x 28)

= (3.14) (784)

= 2461.76 square cm

Total cost to make the sign = 2461.76 x 0.33

= 812.38

The cost for making the sign is $812.38