Factor as completely as possible. If unfactorable, indicate that the polynomial is prime.-5a2 - 21ab - 4b2
A. -(a - 4b)(5a + b)
B. -(a + b)(5a + 4b)
C. (a - 4b)(5a + b)
D. -(a + 4b)(5a + b)
Answer: D
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Find the volume of the indicated region.the region bounded by the paraboloid 
and the xy-plane
A. 
?
B. 14?
C. 56?
D. 98?
Use a graphical method to solve the system. Give x- and y-coordinates correct to the nearest hundredth.y = ln(3x - 2)x2 + 3y2 = 7
A. (1.73, -1.16), (0.74, 1.47) B. (5.25, 2.62) C. (0.74, -1.47), (1.73, 1.16) D. (0.77, 1.46), (-0.59, -1.49)
Solve the problem.
The function f computes the annual interest paid on savings of x dollars with an interest rate of 9%. The graph of f and the horizontal line 
are shown in the figure. Determine the savings amounts that result in (i) an annual interest less than $3.15 and (ii) an annual interest of $3.15 or more.
A. Between $5 and $35; $35 or more B. $35 or less; between $35 and $40 C. $35 or more; $35 D. Between $0 and $35; $35 or more
Solve the problem.Tim needs to apply 2
gallons of herbicide per acre of soybeans. How many gallons of herbicide are needed for 388 acres?
A. 194
gallons
B. 196 gallons
C. 155
gallons
D. 970 gallons