The distribution of passenger vehicle speeds traveling on a certain freeway in California is nearly normal with a mean of 73,7 miles/hour and a standar deviation of 4.75 miles/hour. (a) What percent of passenger vehicles travel slower than 80 miles/hour? (Round your answer to two decimal places.) 90.82 % (b) What percent of passenger vehicles travel between 60 and 80 miles/hour? (Round your answer to two decimal places.) % (c) How fast do the fastest 5% of passenger vehicles travel? (Round your answer to four decimal places.) mph (d) The speed limit on this stretch of the freeway is 70 miles/hour. Approximate what percentage of the passenger vehicles travel above the speed la on this stretch of the freeway. (Round your answer to two decimal places.) 22.12 X%

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