The radius R of a sphere is 8.6mm. Calculate the sphere's surface area A.Use the value 3.14 for π, and round your answer to the nearest tenth.
Question
The radius R of a sphere is 8.6mm.
Calculate the sphere's surface area A.
Use the value 3.14 for π, and round your answer to the nearest tenth.
Solution
The formula for the surface area A of a sphere is given by A = 4πR².
Step 1: Substitute the given values into the formula. The radius R is given as 8.6mm.
A = 4 * 3.14 * (8.6mm)²
Step 2: Square the radius.
A = 4 * 3.14 * 73.96mm²
Step 3: Multiply the result by 4 and π.
A = 4 * 3.14 * 73.96mm² = 928.2304mm²
Step 4: Round the result to the nearest tenth.
A ≈ 928.2mm²
So, the surface area of the sphere is approximately 928.2mm².
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