1.)You are hitting baseballs. When you toss the ball into the air, your hand is 5 feet above the ground (see figure). You hit the ball when it falls back to a height of 3.5 feet. You toss the ball with an initial velocity of 20 feet per second. The height h of the ball t seconds after leaving your hand is given by
h = 5 + 20t ? 16t2.
How much time will pass before you hit the ball? (Round your answer to one decimal place.)
2.) A truck traveled the first 260 miles of a trip at one speed and the last 180 miles at an average speed of 5 miles per hour less. The entire trip took 7 hours. What was the average speed for the first part of the trip?
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