A car is driving away from a crosswalk The formula d = t2 + 2t expresses the car's distance from the crosswalk in feet; d,in terms of the number of seconds, t, since the car started moving:
If t varies from t = 2 to t = 5, what is the car's average speed over that interval? (Hint: You will need to use the formula to determine where the car was at the beginning and end of the interval so you can determine a change in distance
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