How high does it go before returning to the ground

Reference no: EM13179084

A grapefruit is tossed straight up with an initial velocity of ft/sec. The grapefruit is feet above the ground when it is released. Its height at time t is given by

y=-16t^2+42t+4

How high does it go before returning to the ground?

Round your answer to one decimal place.

Reference no: EM13179084

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