For her phone service, Ann pays a monthly fee of
$30, and she pays an additional $0.04 per minute of use. The least she has been charged in a month is $81.36.What are the possible numbers of minutes she has used her phone in a month?
Use m for the number of minutes, and solve your inequality for m.

Question

For her phone service, Ann pays a monthly fee of 
$30, and she pays an additional $0.04 per minute of use. The least she has been charged in a month is $81.36.What are the possible numbers of minutes she has used her phone in a month?
Use m for the number of minutes, and solve your inequality for m.

retireed · Answer

|dw:1478042614689:dw|

retireed · Answer

So the 81.36 - 30 divided by 0.04 will EQUAL the least number of minutes Ann used.  

What are the possible numbers of minutes she has used her phone in a month? 
     All numbers greater than or equal to least number of minutes Ann used.
     I included the equal to because Ann could have only had one bill, or she used the exact same number of minutes each time, highly unlikely but possible.