Question 782199
It went past the 1st 3 minutes so
you have to add $.35
In words:
( cost ) = ( cost for 1st 3 min ) + ( .15 x minutes after that )
Let {{{ x }}} = total minutes minus {{{ 3 }}} minutes
--------------------------------
{{{ c = .35 + .15x }}}
{{{ 12.3 = .35 + .15x }}}
{{{ .15x = 11.95 }}}
{{{ x = 79.667 }}}
Add in the 1st {{{ 3 }}} min
{{{ x + 3 = 82.667 }}}
{{{ 82.667 - 60 = 22.667 }}} min
{{{ .667*60 = 40 }}} sec
The call lasted 1 hour 22 minutes and 40 seconds