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Solve the problem. A fireworks mortar is launched straight upward from a pool deck platform 4 m off the ground at an initial velocity

Solve the problem. A fireworks mortar is launched straight upward from a pool deck platform 4 m off the ground at an initial velocity of 61 m/sec. The height of the mortar can be modeled by h(t) = -4.9t2 + 61t +4 where h(t) is the height in meters and t is the time in seconds after launch. What is the maximum height? Round to the nearest meter. -

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