11-15. A ball is tossed upward from a platform above the surface of the ground. After t seconds, the height "h" (in meters) of the ball above the ground is given by the equation, h= -16t²+28t+8. The height "h" depends on the time "t". Answer the following questions. Show your necessary solution.

•how long will it take the ball to reach the ground?

•When will the ball be after 1 second?

makikisagot po need na po namin ngayon. Salamat po.
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