Author Question: If a school bus is travelling 90 km/hr on dry pavement, the stopping distance is approximately ... (Read 63 times)

mp14 · **on:** May 26, 2021

Question 1

Suppose the thickness of the blacktop on a road that has recently been resurfaced is normal with a mean of 6 cm and a standard deviation of 0.4 cm. What percentage of the blacktop is at least 5 cm thick?
◦ 0.432
◦ 0.006
◦ 0.883
◦ 0.994
◦ 0.722

Question 2

If a school bus is travelling 90 km/hr on dry pavement, the stopping distance is approximately normal with a mean of 100 m and a standard deviation of 10 m. What is the probability that such a school bus could stop within a distance of 80 m?
◦ 0.025
◦ 0.023
◦ 0.014
◦ 0.077
◦ 0.075

kaylee05 · **Reply #1 on:** May 26, 2021

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