Question 1144193
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The additional 53-37 = 16 minutes cost an additional $17.18-$15.42 = $1.76; the rate is $1.76/16 = $0.11 per minute.<br>
The cost of 39 minutes of calls is the cost of 37 minutes of calls plus the cost of 2 more minutes at the rate of $0.11 per minute:<br>
$15.42 + 2($0.11) = $15.42 + $0.22 = $15.64