Answer: " $ 1.29 per roll " .
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Step-by-step explanation:
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Given: C = (1.29) r ;
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We are asked to find the cost of one rol,l;
in dollars per single roll.
Since "r" refers to "number of rolls" ;
Let "r" be equal to "1" ; and solve for "C" ;
C = (1.29) r ;
= (1.29)*(1) ;
= (1.29) .
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The answer is: " $ 1.29 per roll " .
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Hope this is helpful!
Best wishes!
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