Use the even-odd identities to find the exact value of the expression. tan (-30°)
A. -
B. 
C. - 
D. 
Answer: C
Mathematics
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At one high school, students can run the 100-yard dash in an average of 15.2 seconds with a standard deviation of 0.9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are:Less than 17 seconds
A. 98% B. 97.5% C. 84% D. 2.5%
Mathematics
Find the partial fraction decomposition for the rational expression.
A. 2x - 9 + 
+ 
B. 2x + 9 + 
+ 
C. 2x + 5 + 
+ 
D. 2x - 9 + 
- 
Mathematics
Solve the problem. There are currently 77 million cars in a certain country, decreasing exponentially by 5.5% annually. How many years will it take for this country to have 67 million cars? Round to the nearest year.
A. 3 yr B. 42 yr C. 10 yr D. 2 yr
Mathematics
Evaluate.12C7
A. 1,995,840 B. 792 C. 240 D. 95,040
Mathematics