Simplify.
? 
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Solve the problem. Round to the nearest hundredth, if necessary.The average middle-distance runner at a local high school runs the mile in 5.5 minutes, with a standard deviation of 0.4 minute. Find the percentage of runners that will run the mile in less than 4.8 minutes.
A. 95.99% B. 4.01% C. 4.46% D. 94.54%
Mathematics
Solve the equation.3|x - 3| = 18
A. {3, -9} B. {9, -3} C. no solution D. {3}
Mathematics
Solve the equation on the interval [0, 2?).cos
- cos
= 1
A. 
, 
B. 
, 
C. 
, 
D. 
, 
Mathematics
Change the polar coordinates (r, ?) to rectangular coordinates (x, y).
A. 
B. 
C. 
D. 
Mathematics