a bicyclist is riding at a speed of 20 mi/h when she starts down a long hill. The distance d she travels in feet can be modeled by the function d(t) = 5t^2 + 20t, where t is the time in seconds.

a. The hill is 585 ft long. To the nearest second, how long will it take her to reach the bottom?

b. Suppose the hill were only half as long. To the nearest second, how long would it take the bicyclist to reach the bottom?

Question

a bicyclist is riding at a speed of 20 mi/h when she starts down a long hill. The distance d she travels in feet can be modeled by the function d(t) = 5t^2 + 20t, where t is the time in seconds.

a. The hill is 585 ft long. To the nearest second, how long will it take her to reach the bottom?

b. Suppose the hill were only half as long. To the nearest second, how long would it take the bicyclist to reach the bottom?

triciaal · Answer

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