Question 1043837
{{{ A = P*( 1 + r*t ) }}}
{{{ P }}} is the amount you wouls have to invest
{{{ A = P + P*r*t }}}
------------------
The amount earned is the intyerest, {{{ I = P*r*t }}}
{{{ 400 = P*.085*8 }}}
{{{ P = 400/.68 }}}
{{{ P = 588.23 }}}
$588.23 should be invested