Use the rational zero theorem, Descartes's rule of signs, and the theorem on bounds as aids in finding all real and imaginary roots to the equation.6x3 + 19x2 + 8x - 5 = 0
A. - 
, - 
, 
B. - 1, - 
, 
C. 
, multiplicity 2; - 
D. - 1, 
, 
Answer: B
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Use integration by parts to establish a reduction formula for the integral.
A. 
= - 
xn-1 e- x2 + 
B. 
= n xn-1 e- x2 + 2n 
C. 
= - 2xn-1 e- x2 - 2(n - 1) 
D. 
= - 
xn e- x2 + 
Evaluate the logarithm.log6
A. 1 B. 6 C. -1 D. 0
Solve.Jeff takes 5 hr longer to build a fence than it takes Bill. When they work together, it takes them 6 hours. How long would it take Bill to do the job alone?
A. 10 hours B. 11 hours C. 12 hours D. 9 hours
Solve.The annual depreciation rate r (0 < r < 1) of a car purchased for P dollars and worth A dollars after t years can be modeled by the following formula: 
Find the depreciated value of a car 4 years after it is purchased new for $34,000 if the depreciation rate is 19%. Round your answer to the nearest dollar.
A. $27,540 B. $14,636 C. $6460 D. $44