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If 6 men can do a piece of work in 14 days, how many men are needed to do the work in 21 days? a. 3 b. 9 c. 5 d. 4 e. none
Seven times a number is the same as 12 more than 3 times the number. Find the number.
A company uses the function C(x)= 0.2X^2-3.4x+150 to model the unit cost in dollars for producing x bars. For what number of bars is the unit cost at its minimum? What is the unit cost at that level of production?
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