At one high school, students can run the 100-yard dash in an average of 15.2 seconds with a standard deviation of .9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are indicated. Round to the nearest whole percent.Greater than 15.2 seconds
A. 50%
B. 48%
C. 34%
D. 68%
Answer: A
Mathematics
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A certain tree grows by 2/t + e(-t2/2) feet per year, where t is the time in years. Use Simpson's rule with whole year intervals to estimate the total growth during the stated time interval.From t = 1 to t = 3
A. 3.5 ft B. 3.94664 ft C. 2.59378 ft D. 2.14706 ft
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Write the following as an algebraic expression in u, u > 0.cos(arctan u)
A. u
B. 
C. 
D. 
Mathematics
Solve the system of equations.
A. (3, 4, 9) B. (-3, 9, 6) C. (3, 9, 4) D. No solution
Mathematics
Find the distance d(A, B) between the points A and B.A = (2, -1); B = (6, -7)
A. 20
B. 2
C. 20
D. 10
Mathematics