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. a. Suppose t varies from t = 1 to t = 5. i. Does the car travel at a constant speed over this interval of time? No ii. What is the car's average speed over this interval of time? * feet per second Preview b. Suppose t varies from t = 1.8 to t = 2.3. i. Does the car travel at a constant speed over this interval of time? No ii. What is the car's average speed over this interval of time? * feet per second Preview Submit