Aphone company offers two monthly charge plans. in plan a, the customer pays a monthly fee of
$30
and then an additional
9
cents per minute of use. in plan b, the customer pays a monthly fee of
$36
and then an additional
7
cents per minute of use.
for what amounts of monthly phone use will plan a cost less than plan b?
use
m
for the number of minutes of phone use, and solve your inequality for
m
.