core in gradebook:0 out of 10 eattempt last question below, or select another qu

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core in gradebook:0 out of 10 eattempt last question below, or select another questi The distance, s (in feet), traveled by a car moving in a straight line is given by the formulas+3t+3, where t is the number of seconds elapsed since the car started moving. a. Determine the average speed for the time period from t 1 to t 1.8 feet per second Preview feet per second Preview feet per second Preview .05 b. Determine the average speed for the time period from t = 1 to t = 6.9 . 71.3115.9) C. Determine the average speed for the time period from t-1 to t = 99. Points possible: 10 This is attempt 2 of 5. Score on last attempt: 0. Score in gradebook:0 Post this question to forum C When you are done, click here to see a summary of your scores 1 9

Explanation / Answer

s = t^2 + 3t + 3

a) v = [s(1.8) – s(1)]/(1.8 - 1) = [(1.8^2 + 3*1.8 + 3) – (1 + 3 + 3)]/0.8 = 5.8 m/s

b) v = [s(6.9) – s(1)]/(6.9 - 1) = [(6.9^2 + 3*6.9 + 3) – (1 + 3 + 3)]/5.9 = 10.9 m/s

c) v = [s(9.9) – s(1)]/(9.9 - 1) = [(9.9^2 + 3*9.9 + 3) – (1 + 3 + 3)]/8.9 = 13.9 m/s

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