Given:
Ashley pays a monthly fee of $19, and she pays an additional $0.05 per minute of use. The least she has been charged in a month is $72.15.
Required:
Find 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.
Explanation:
The initial amount paid by Ashley = $19
The additional amount per minute = $0.05
Let the number of minutes used in the phone = m
The least amount that is charged in a month = $72.15
Now by using the given information
[tex]19+0.05m\ge72.15[/tex]Solve for m as:
[tex]\begin{gathered} 0.05m\ge72.15-19 \\ 0.05m\ge53.15 \\ m\ge\frac{53.15}{0.05} \\ m\ge1063 \end{gathered}[/tex]Thus at least 1063 minutes were used on Ashley's phone in a month.
Final Answer:
The least possible minutes are 1063.
