Solve the problem.Assume the total revenue from the sale of x items is given by 
while the total cost to produce x items is 
Find the approximate number of items that should be manufactured so that profit, 
is maximum.
A. 52 items
B. 126 items
C. 93 items
D. 158 items
Answer: C
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Solve the problem.Assume that a person's threshold weight W, defined as the weight above which the risk of death rises dramatically, is given by W(h) = 
3 , where W is in pounds and h is the person's height in inches. Find the threshold weight for a person who is 6 ft 7 in. tall. Round your answer to the nearest pound.
A. 265 lb B. 161.6 lb C. 221.5 lb D. 296.3 lb
Which best describes the thinking strategy of a student who changes the expression 4x + 5 -7x -2 to 4x + 5 + (-7x) + (-2) before trying to simplify it?
a. Automization b. Guessing-substituting c. Preparatory modification d. Using quasi-rules
Factor completely.x3 - x2 - 12x
A. prime B. x(x + 3)(x - 4) C. x(x + 4)(x - 3) D. (x2 + 1)(x - 12)
Find the quotient. If the quotient is a repeating decimal, write the answer with a bar over the repeating digit or digits.16 ÷ 0.04
A. 400 B. 0.4 C. 4 D. 40