Question 190458
Given {{{N = sqrt(x+4)}}}

1.Approximately how many cases of the infection will there be 16 years from now?
{{{N = sqrt (16+4)}}}
{{{N = sqrt(20)}}}
{{{N = 4.47}}} millions


2.In approximately how many years will there be 6 million cases? 
{{{6 = sqrt(x+4)}}}  square both sides to eliminate the radical
{{{36 = x+4}}}
{{{32 = x}}}