At one high school, the mean time for running the 100-yard dash is 
with a standard deviation of 0.9 seconds. The times are normally distributed.Find the percent of times that are below 15.2 seconds.
A. 68%
B. 34%
C. 50%
D. 16%
Answer: C
Mathematics
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Use your calculator to perform the indicated operations. Give as many digits in your answer as shown on your calculator display.3.1 + (9 - 7) × 14.3
A. 15.40 B. 72.93 C. 124.80 D. 31.70
Mathematics
For 
, 
is an exterior angle. Which of the following must be true?
A. 
B. 
C. 
D. 
Mathematics
The function f is one-to-one. Find its inverse.f(x) =
A. f-1(x) = x - 3
B. f-1(x) = x3 + 9
C. f-1(x) = 
D. f-1(x) = x3 - 3
Mathematics
Find i (the rate per period) and n (the number of periods) for the loan at the given annual rate.Annual payments of $378.80 are made for 8 years to repay a loan at 6.4% compounded annually.
A. i = 0.064; n = 16 B. i = 0.00533; n = 12 C. i = 0.064; n = 8 D. i = 0.008; n = 8
Mathematics