# Math

a shark jumps out the water. Yhe function f(x)=-16x^2+21x models the shark's height, in feet, above the water after x seconds. How longis teh shark out of the water

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1. the peak of the jump lies on the axis of symmetry of the parabola
... x = -b / 2a = -21 / (2 * -16)

time up equals time down

time of flight (jump) = 2 * 21/32

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posted by Scott

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