Question

The Roaming Cell Phone Company charges $15.00 per month plus $0.20 per minute of airtime usage. If Tara's cell phone bill is $75, how many minutes did she talk on the phone?

a) 300 minutes
b) 400 minutes
c) 375 minutes
d) 250 minutes

Answer 1

Tara talked for 300 minutes on her phone. This calculation is based on subtracting the flat monthly charge from her total bill and then dividing the remaining amount by the rate charged per minute by the Roaming Cell Phone Company.

Step-by-step explanation:

To calculate how many minutes Tara talked on the phone based on her $75 cell phone bill, we need to use the rate provided by the Roaming Cell Phone Company. The company charges a flat rate of $15.00 per month and $0.20 per minute of airtime usage. We can represent Tara's cell phone bill with the equation:

Monthly Charge + (Charge per Minute x Number of Minutes) = Total Bill

So, $15.00 + ($0.20 x Minutes) = $75.00

First, subtract the monthly charge from the total bill to find out how much money went towards the airtime:

$75.00 - $15.00 = $60.00

Next, divide the remaining amount by the per-minute charge to find out the total minutes of usage:

$60.00 / $0.20 = 300 minutes

Hence, Tara used 300 minutes of talk time on her phone.