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The cost C of printing a magazine is jointly proportional to the number of pages p in the magazine and the number of magazines printed m. (Use k for the constant of proportionality.)

AWrite an equation that expresses this joint variation.

BFind the constant of proportionality if the printing cost is $65,550 for 3800 copies of a 115-page magazine.


CHow much would the printing cost be for 3500 copies of a 84-page magazine?

Verified Answer :

nobillionaireNobley

a.) C = kpm

b.) 65,550 = k 115 3800 = 437,000k
k = 65,550/437,000 = 0.15

c.) C = 0.15 84 3500 = $44,100

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