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 16.1 and 17 seconds
A. 34%
B. 27%
C. 12%
D. 13.5%
Answer: D
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Factor completely.49x2 - 25
A. (7x + 5)2 B. (7x - 5)2 C. (49x + 1)(x - 25) D. (7x + 5)(7x - 5)
Make a logistic model 
for enrollment at a university t years after 2000 making use of the following information.A University facilities can accommodate at most 5,829 students.B: Enrollment in 2000 is 2,116.C: In the absence of limiting factors, enrollment would grow by 13% per year.
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A. 
B. 
C. 
D. 
Find the center and the radius of the circle.x2 - 6x - 27 = 0
A. (3, 0), r = 6 B. (0, 3), r = 6 C. (-3, 0), r = 6 D. (0, -3), r = 6
A traveling salesman's territory consists of the 5 cities shown on the following mileage chart. The salesman must organize a round trip that starts and ends at Louisville (his hometown) and will pass through each of the other four cities exactly once.Mileage Chart
At an average cost of 25 cents per mile, the cheapest possible trip that starts at Louisville and passes through each of the other cities exactly once would cost
A. $551.00. B. $578.25. C. $606.50. D. $541.75. E. none of these