Perform the indicated operation and simplify.
- 
A. 
B. 
C. 
D. 
Answer: D
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Solve the quadratic equation.(8x + 11)(8x + 15) = 0
A. x = - 
or x = - 
B. x = 
or x = 
C. x = 3 or x = 7
D. x = - 
or x = - 
Find the local extrema of the function, if they exist.f(x) = x4 - 2x2 - 9
A. Local minimum at (0, -9); Local maxima at (1, -10), (-1, 8) B. Local maximum at (1, -10); Local minimum at (-1, -10) C. Local maximum at (0, -9); Local minima at (1, -10), (-1, -10) D. Local maximum at (0, -9); Local minimum at (1, -10)
Find a set of polar coordinates for the point for which the rectangular coordinates are given.(2, 5)
A. (3.22, 0.81) B. (3.22, 2.19) C. (5.39, 0.81) D. (5.39, 1.19)
Solve the problem.Suppose that the revenue from selling x radios is r(x) = 70x - 
dollars. Use the function r '(x) to estimate the increase in revenue that will result from increasing production from 120 radios to 121 radios per week.
A. $45.80 B. $46.00 C. $94.00 D. $58.00