Solve the problem.A mechanic is testing the cooling system of a boat engine. He measures the engine's temperature over time. Use a graphing utility to fit a logistic function to the data. What is the carrying capacity of the cooling system?
A. y = 
, 315°F
B. y = 
, 315°F
C. y = 
, 312°F
D. y = 
, 307°F
Answer: B
Mathematics
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Solve by completing the square to obtain exact solutions.x2 = 9 - 4x
A. -1 ± 
B. -2 ± 
C. 2 + 
D. -2 ± 2
Mathematics
Find the second derivative.y = 5x4 - 4x2 + 5
A. 20x2 - 8x B. 60x2 - 8 C. 60x2 - 8x D. 20x2 - 8
Mathematics
Express the integrand as a sum of partial fractions and evaluate the integral.
dx
A. 2 ln 
- 
+ ln 
+ 
tan-1 
+ C
B. 5 ln 
+ 
- ln 
+ sin-1 
+ C
C. 7 ln 
+ ln 
+ 
tan-1 
+ C
D. 2 ln 
+ ln 
+ 
tan-1 
+ C
Mathematics
Graph the polar equation.r = 3(2 + 2 sin ?)
A. 
B. 
C. 
D. 
Mathematics