Answer
13 minutes
Work Step by Step
Step 1) 0.25n = 0.35 = c ... To get your total cost for the call, multiply 0.25 by the number of minutes plus the base charge of 0.35
Step 2) 3.60 = 0.25n + 0.35 ... Find the number of minutes for a call that cost 53.60
Step 3) 3.25 = 0.25n ... Subtract 0.35 from both sides
Step 4) n = 13 ... Divide 3.25 by 0.25
Step 5) 13 minutes ... Final Answer
