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## Homework Statement

Fire a cannon ball at 30 degrees above the horizontal with an initial speed of 65 m/s from the top of a building 50 m high.

Find the total time the cannon ball is in the air.

What's the horizontal distance from the base of the building when the ball strikes the ground?

## Homework Equations

## The Attempt at a Solution

For the time I got 7.9 s, but I don't know if that's right.