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At Lincoln Library there are two ways to pay for copying. You can pay 15...

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Finance

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At Lincoln Library there are two ways to pay for copying. You can pay 15 cents a copy, or you can buy a plastic card for $4 and then pay 5 cents a copy. Let x be the number of copies you make. Write an equation for your costs for each way of paying. (Express C(x) in dollars.) without card C(x)= with card C(x)= (a) How many copies do you need to make before buying the plastic card is the same as cash? copies (b) If you wish to make 30 copies, which way of paying has the least cost? they are the same without card with card cannot be determined

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