Question 550830
(1) The first plan has daily cost = {{{ .08x + .4 }}}
(2) The 2nd plan has daily cost = {{{ .25x }}}
(3) The costs will be the same when:
{{{ .08x + .4 = .25x }}}
{{{ .25x - .08x = .4 }}}
{{{ .17x = .4 }}}
{{{ x = 2.353 }}}
{{{ .353*60 = 21 }}}
The costs are the same when 2 minutes and 21 seconds
of phone calls are used in one day