Mathematics, 05.11.2019 03:31, leo4687

Atoy cannon ball is launched from a cannon on top of a platform. the equation h(t) = -5t^2 + 20t + 4 gives the height h, in meters, of the ball t seconds after it is launched.

a. what equation can be used to tell whether the ball reaches a height of 12 m ?
b. does the ball reach a height of 12m? (yes or no)

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Atoy cannon ball is launched from a cannon on top of a platform. the equation h(t) = -5t^2 + 20t + 4...