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You kick a ball into the air, from the ground on level ground, with an initial...

You kick a ball into the air, from the ground on level ground, with an initial speed of 35.8 m/s at an angle of 45° from the horizontal. At what time (times) is the ball at a height of 30.0 m? If there is more than one time at which the ball reaches 30.0 m, explain. If there is only one time at which the ball reaches 30.0 m, explain.
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