Find the real solutions of the equation by factoring.x3 - 4x = 0
A. {0, -2}
B. {0, 2}
C. {0, 2, -2}
D. {0, 4}
Answer: C
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Solve the problem.The manufacturer of a CD player has found that the revenue R (in dollars) is 
when the unit price is p dollars. If the manufacturer sets the price p to maximize revenue, what is the maximum revenue to the nearest whole dollar?
A. $71,556 B. $572,450 C. $143,113 D. $286,225
Solve the problem.If an object weighs m pounds at sea level, then its weight W (in pounds) at a height of h miles above sea level is given approximately by W(h) = m 
2. How much will a man who weighs 165 pounds at sea level weigh on the top of a mountain which is 14,494 feet above sea level? Round to the nearest hundredth of a pound, if necessary.
A. 165 pounds B. 7.72 pounds C. 165.23 pounds D. 164.77 pounds
Simplify the radical expression. Assume all variables represent positive real numbers.
A. -7 B. 19 C. 49 D. ±7
Simplify the expression. Leave answers with exponents.(-2x3y2)4
A. -24x12y8 B. -2x12y8 C. (-2)4x12y8 D. 24x7y6