Solve
-A Ball Is Thrown Upward with an Initial Velocity $h = - 4.9 t ^ { 2 } + 35 t + 100$

question 29

Multiple Choice

Solve.
-A ball is thrown upward with an initial velocity of 35 meters per second from a cliff that is 70 meters high. The height of the ball is given by the quadratic equation $h = - 4.9 t ^ { 2 } + 35 t + 100$ where $h$ is in meters and $t$ is the time in seconds since the ball was thrown. Find the time that the ball will be 30 meters from the ground. Round your answer to the nearest tenth of a second.

• A) \(9.4\) seconds
• B) \(9.3\) seconds
• C) \(8.8\) seconds
• D) \(8.9\) seconds

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