A company specializing in making toys has made several rat toys in form of a shpere. If the radius of a toy is 3 inches, calculate the surface area of a toy?
The correct answer is C (113.04).
The surface area of a sphere is given by the formula:
Surface area \(= 4\pi r^{2}\)
Substitute the radius r = 3 inches:
Surface area \(= 4 \times\) \(\pi\) \(\times\) 3^{2}
\(\displaystyle = 4 \times \pi \times 9\)
\(\displaystyle = 36\pi\)
Using \(\pi\) \(\approx\) 3.14:
\(36 \times\) 3.14 = 113.04 square inches
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