To calculate the volume of a sphere, you can use the formula:
\[ V = \frac{4}{3} \pi r^3 \]
Given that the radius \( r \) is 5 feet and using \( \pi \approx 3.14 \):
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Calculate \( r^3 \): \[ r^3 = 5^3 = 125 \]
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Plug \( r^3 \) into the volume formula: \[ V = \frac{4}{3} \times 3.14 \times 125 \]
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Calculate \( \frac{4}{3} \times 3.14 \): \[ \frac{4}{3} \times 3.14 \approx 4.1867 \]
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Now multiply it by 125: \[ V \approx 4.1867 \times 125 \approx 523.3375 \]
Rounding to the nearest tenth gives us:
\[ V \approx 523.3 \]
Thus, the volume of the sphere is 523.3 ft.³.