Unformatted text preview: st is
changing 15 minutes later?
b. How fast is the distance between the plane and the station changing after 15 minutes?
4. A manufacturer makes boxes with square bottoms. The cost of 10-cubic-foot box with bottom dimensions by is
= 5 + 80/ . What is the minimum cost of a box if must be at least 1 foot but no more than 3
feet? 5. A ball is tossed up vertically from ground level and returns to earth 4 seconds later. What was the initial
velocity of the ball and maximum height. (Use
with = 32 ft/s .)
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