Question 1124526
{{{ P = 240 }}}
{{{ -t^2 + 17t + 180 = 240 }}}
{{{ - t^2 + 17t - 60 = 0 }}}
{{{ ( -t + 12 )*( t - 5 ) = 0 }}}
{{{ t = 12 }}}
{{{ t = 5 }}}
The lower value is OK, {{{ 1 <= t <= 6 }}}
On the 5th day 240students got the flu
Here’s the plot:
{{{ graph( 700,400, -5, 30, -30, 300, -x^2 + 17x + 180 ) }}}