Question 200924
(a)
{{{C(x) = 1.4x/(100 - x)}}}
{{{C(60) = 1.4*60 / (100 - 60)}}}
{{{C(60) = 84 / 40}}}
{{{C(60) = 2.1}}} million
(b)
{{{4 = 1.4x / (100 - x)}}}
{{{4*(100 - x) = 1.4x}}}
{{{400 - 4x = 1.4x}}}
{{{5.4x = 400}}}
{{{x = 74.074}}}
About 74% participation is needed