第一題:Suppose that for a certain company Costs:25ax+4000.78 represents the total cost funcation and Revenue 65x represent the total revenue function. Find the total-profit function and break-even point
第二題:The number of aluminum cans used each year varies directly as the number of people P using the cans. If 375 people use X cans in one year, how many cans are used in Dallas which has a population of 375x
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