Question

Denise's cell phone plan is $29.95 per month plus $.10 per minute for each minute over 300 minutes of call time. Denise's cell phone bill is $99.95. For how many minutes was she billed?

Answer 1

She was billed for 1000 minutes. If she gets 300 minutes free, then her bill would be $29.95. But her bill was $99.95, so she was billed $70 worth of the minutes over 300 minutes. $70 divided by $0.10 is 700. Seven hundred minutes plus 300 minutes equals 1000 minutes in total.