Factor completely.80x2 - 45
A. 5(4x + 3)2
B. (4x - 3)(20x + 15)
C. 5(4x - 3)(4x + 3)
D. (20x - 15)(4x + 3)
Answer: C
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A 1.5-mm layer of paint is applied to one side of the following surfaces. Find the volume of paint needed. Assume that x and y are measured in meters.The spherical zone generated when the upper portion of the circle x2 + y2 = 121 on the interval 
is revolved about the x-axis.
A. 
? m3
B. 594? m3
C. 
m3
D. 
? m3
Plot the pair of points and determine the slope of the line containing them. Graph the line.(-7, 7), (-2, -3)
A. m = - 2
B. m = - 
C. m = 2
D. m = - 
Solve.A specialty watch company's monthly profit equation is P = -2x2 + 600x + 25,000,where x is the number of watches manufactured. Find the maximum monthly profit and the number of watches that must be produced each month to attain the maximum profit.
A. Maximum profit = $70,000 number of watches produced = 300 B. Maximum profit = $25,000 number of watches produced = 600 C. Maximum profit = $70,000 number of watches produced = 150 D. Maximum profit = $25,000 number of watches produced = 0
Find the real solutions of the equation by factoring.3x4 = 375x
A. {-5, 0, 5} B. {0, 3, 5} C. {0, 5} D. {0}