Question

A DVD has a diameter of 18 centimeters. What is the area of the DVD? Round your answer to the nearest hundredth. Use 3.14 for π.

Answer 1

254.34 cm²

Explanation:

A = πr2 Use the formula.

A = π(9)2 Substitute. Use 9 for r.

A ≈ 3.14 × 92 Substitute. Use 3.14 for π.

A ≈ 3.14 × 81 Evaluate the power.

A ≈ 254.34 Multiply.

The area of the DVD is about 254.34 cm².

Answer 2

the area is about 113.04 centimeters