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9966 [12]
3 years ago
11

A scientist wants to find the radius, in feet, of this hemispherical dome. He found that the surface area of the entire sphere c

ontaining the dome is 294 square feet. Which equation could he use to find the dome's radius?
A. r2=294 square feet ÷ 4π
B. r2=294 square feet ÷ 2π
C. r2=294 square feet ÷ π
D.r2=588 square feet ÷ 4π
Mathematics
1 answer:
skelet666 [1.2K]3 years ago
7 0
The surface area of a sphere by definition is given by:
 A = 4 * π * r ^ 2
 Where,
 r: radius of the sphere.
 Substituting the values we have:
 294 = 4 * π * r ^ 2
 We cleared the radio:
 r ^ 2 = (294) / (4 * π)
 Answer:
 An equation that I could use to find the dome's radius is:
 A. r2 = 294 square feet ÷ 4π
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