physics

A disgruntled physics student,frustrated with finals,releases his tensions by bombarding the adjacent building,17.7 m away with water balloons. He fires one at 38 degrees from the horizontal with an initial speed of 27.1 m/s. The acceleration of gravity is 9.8 m/s^2. for how long is the balloon in the air? Answer in seconds

How far above the initial launch height does the balloon hit the opposing building? Answer in m

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