Question: After t hours a freight train is s(t) = 17t2 - 5t miles due north of its starting point (for 0 s t 9)


After t hours a freight train is s(t) = 17t2 - 5t miles due north of its starting point (for 0 s t 9) (a) Find its velocity at time t = 3 hours. mi/hr (b) Find its velocity at time t = 7 hours. mi/hr (c) Find its acceleration at time t = 1 hour. mi/hr Evaluate the expression. d 9+2+17 x = -1
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