Question 1186548
A cellular phone company charges $34 per month plus 20 cents for each minute, or fraction of a minute, that you use one of their cellular phones. The expression 
3400+20t/100
 gives the amount of money, in dollars, you will pay for using one of their phones for t minutes a month. Find the monthly bill for using one of their phones for 75 minutes in a month.
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check your expression.
Sub 75 for t and do the arithmetic.