Equation and word problem
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A cellular phone company offers a contract for which the cost C, in dollars, of t minutes of telephoning is given by C=0.25(t-500)+53.95, where it is assumed that t is greater than or equal to 500 minutes. What times will keep costs between $100.70 and $134.45?
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Solution Summary
This provides an example of using an equation to solve a word problem.
Solution Preview
We have to set your equation equal to each of the costs, and solve for t in both cases. Those t values will be ...
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