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A Ball Is Dropped from a Roof

Question 228

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A ball is dropped from a roof. Its height in meters is described by the equation A ball is dropped from a roof. Its height in meters is described by the equation t seconds after launch. When is the rock at a height of 20 meters? Round to two decimal places. t seconds after launch. When is the rock at a height of 20 meters? Round to two decimal places.

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