A hot air balloon is in the shape of a sphere. Approximately how much fabric was used to construct the balloon if its diameter is 29 ft? Round to the nearest whole number. A) 10,568 ft² B) 102,160 ft² C) 2642 ft² D) 661 ft² E) 5284 ft²

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Quizplus · Accepted Answer

The formula for the surface area of a sphere is 4πr^2, where r is the radius (half the diameter). In this case, the radius is 14.5 ft (half of 29), so the surface area is approximately 2642 square feet. To find the amount of fabric used, we need to multiply this by the thickness of the fabric (in feet). Since we don't know the thickness of the fabric, we can't get an exact answer, but we can still choose the closest option, which is C) 2642 ft (rounded to the nearest whole number).

A Hot Air Balloon Is in the Shape of a Sphere