A rock is tossed from a platform and follows a parabolic path through the air. The height of the rock in meters is given by h(t) = -5t^2 + 12t + 14, where t is measured in seconds. b. How long is the rock in the air?
c. For what times is the height of the rock greater than 17 m?
d. How long is the rock above a height of 17 m?

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