The function d(t) = 17t²  110t gives the distance a car going a certain speed will skid in t seconds. Find the time it would take for the car to skid 180 feet.
d(t) is the distance the car skids
t is the time the car skids So, substitute 180 in for d(t), and then solve for t, to find the time the car skids for 180 feet. 180 = 17t²  110t {substituted 180 in for d(t)} 17t²  110t  180 = 0 {subtracted 180 from each side} You can solve this equation by graphing it on the graphing calculator. You are looking to see where the graph intersects the xaxis (or in this case the taxis). That is the value of x (or t) that makes the yvalue (or d(t)) equal to zero. Also, you are only looking for the positive xintercept, since time cannot be negative.
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