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An object moving in a straight line travels s(t) kilometers in t hours, where s(t) = 7t + 5t. (a) What is the object's

An object moving in a straight line travels s(t) kilometers in t hours, where s(t) = 7t + 5t. (a) What is the object's velocity when t = 6? (b) How far has the object traveled in 6 hours? (c) When is the object traveling at a rate of 6 km/h? (a) The object's velocity when t=6 is km/h.

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