Answer:
Explanation:
175 minutes
Unit cost =
cost
number of minutes
$3.50
175
= 2¢;
$7.00
200
= 3.5¢;
$21.25
425
= 5¢;
$38.15
545
= 7¢;
$37.50
625
= 6¢
6.5m questions
8.6m answers