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12 Nov 2019

Projected Picture

The area of a projected picture on a movie screen varies directly as the square of the distance from the projector to the screen. If a distance of 20 feet produces a picture with an area of 6[c] square feet, what distance produces an area of 1[a]0 square feet? Round to the nearest tenth of a foot.

Note: if [a]=2, then 1[a]0=120 feet, and if [c]=8, then 6[c]=68 feet

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Jean Keeling
Jean KeelingLv2
20 Feb 2019

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