Evaluate the integral by using a substitution prior to integration by parts.
A. x 
2 - 2x 
+ C
B. x 
2 - x 
+ x + C
C. x 
2 + 2x 
- 2x + C
D. x 
2 - 2x 
+ 2x + C
Answer: D
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Solve the problem.The motion of a spring-mass system is described by the equation 
where y is the distance in feet from the equilibrium position and t is time in seconds. At which of the following times is the mass moving away from its equilibrium position: t = 1, t = 5/4, t = 7/4, t = 2 ?
A. t = 2
B. t = 1
C. t = 
D. t = 
If possible, evaluate the expression by hand. If not, approximate the answer to the nearest hundredth. Variables represent any real number.-
A. |x - 9| B. -|x + 9| C. -x - 9 D. |x + 9|
Identify the polynomial as a monomial, binomial, trinomial, or none of these.-18y3 + 6y2 + -5
A. Trinomial B. None of these C. Binomial D. Monomial
Find the area. Leave your answer in terms of pi.A circle with radius 6.25 ft
A. 25.00? ft2 B. 12.50? ft2 C. 156.25? ft2 D. 39.06? ft2