Solve the problem.S(x) = -x3 - 3x2 + 72x + 900, x ? 2 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. 4°C
B. 6°C
C. 8°C
D. 2°C
Answer: A
Mathematics
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Write the improper fraction as a mixed or whole number.
A. 30
B. 211
C. 209
D. 
Mathematics
Find the indicated quantity.a1, when d = -3 and a49 = -145
A. -7 B. -3 C. -4 D. -1
Mathematics
y?? +16y = 8x ? 32, y (0) = 4, y?(0) = 3 8
Solve the initial-value problem.
Mathematics
Evaluate the integral.
A. 
[(5x + 4)3/2 - (5x + 2)3/2 ]
B. 
[(20 +y)3/2 - (10 + y)3/2 ]
C. 
[(5x + 4)3/2 - (5x + 2)3/2 ]
D. 
[(20 +y)3/2 - (10 + y)3/2 ]
Mathematics