At one high school, students can run the 100-yard dash in a mean of 15.2 seconds with a standard deviation of 0.9 seconds. The times are very closely approximated by a normal curve. Rounding to the nearest tenth of a percent as necessary, find the percent of times that are:Between 15.2 and 16.1 seconds

A. 34%
B. 68%
C. 13.5%
D. 50%


Answer: A

Mathematics

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Write a formula for the general term, or nth term, for the given sequence.1 ? 6, 2 ? 7, 3 ? 8, 4 ? 9, 5 ? 10, . . .

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Solve the equations by factoring.5x2 - 25x + 30 = 0

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Suppose that the distance function for the vehicle moving in a straight is given by the equation , where t represents the time of movement. How much time should be spent to maximize the distance.  

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Mathematics