If 
and 
are both right angles, then one can conclude that:
A. a? b
B. b? d
C. a || b
D. None of These
Answer: D
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Write the improper fraction as a mixed number or a whole number.
A. 
B. 6
C. 
D. 
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%
Solve the problem.What is the rate on an investment that doubles $2520 in 17 years? Assume interest is compounded quarterly.
A. 4.1% B. 5.1% C. 3.1% D. 2.0%
Determine the difference quotient 
(h ? 0) for the function f. Simplify completely.f(x) = 9x2 + 15x - 13
A. 18x + 15 + 9h B. 18x + 15 C. 9x + 6 + 18h D. 18xh + 15h + 15h2