Question

Manuel noticed that his cellphone bill reflected a monthly fee of

$40 as well as a charge for $0.05 per minute on the phone.
Manuel lost his August phone bill, but remembers that he paid
$48 total for the month. How many minutes did he spend on the
phone in August? Fill in the blank with a number only.

Answer 1

He spent on 16 minutes

Explanation:

Given

`Base\ Amount = \$40`

`Charge = \$0.5` per minute

`Total = \$48`

Required

Determine the number of minutes

Let the number of minutes be n

If 1 minute costs $0.5

n minutes would cost $0.5n

The relationship between the given parameters is

`Total = Base\ Amount + Charges`

Substitute values for each of the above

`48 = 40 + 0.5n`

Solve for 0.5n

`0.5n = 48 - 40`

`0.5n = 8`

Solve for n

`n = 8/0.5`

`n = 16`

He spent on 16 minutes