Solve
-A Ball Is Thrown Upward with an Initial Velocity $h = - 4.9 t ^ { 2 } + 35 t + 90$

question 237

Multiple Choice

Solve.
-A ball is thrown upward with an initial velocity of 35 meters per second from a cliff that is 90 meters high. The height of the ball is given by the quadratic equation $h = - 4.9 t ^ { 2 } + 35 t + 90$ where $h$ is in meters and $t$ is the time in seconds since the ball was thrown. Find the time it takes the ball to hit the ground. Round your answer to the nearest tenth of a second.

• A) \(9.2 \mathrm { sec }\)
• B) \(9.7 \mathrm { sec }\)
• C) \(14.2 \mathrm { sec }\)
• D) \(8.7 \mathrm { sec }\)

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