Solve the problem.S(x) = -x3 - 9x2 + 165x + 1300, 5 ? x ? 20 is an approximation to the number of salmon swimming upstream to spawn, where x represents the water temperature in degrees Celsius. Find the temperature that produces the maximum number of salmon.
A. 5°C
B. 19°C
C. 20°C
D. 6°C
Answer: A
Mathematics
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Find the integral.
A. 9x ln x - x + C B. x ln 9x - 9x + C C. x ln 9x + x + C D. x ln 9x - x + C
Mathematics
Match the point in polar coordinates with either A, B, C, or D on the graph.
A. A B. B C. C D. D
Mathematics
Translate the sentence to an equation then solve.3 is equal to 
of x.
A. 
= 3x, x = 
B. 3 = 
x, x = 
C. 
= 3x, x = 
D. 3 = 
x, x = 
Mathematics
Select the correct graph of the following function.
?
?
A. ?
B. ?
C. ?
D. ?
E. ?
Mathematics