Question 881052
a){{{T=90(0.98)^x}}}
{{{T=90(0.98)^7}}}
{{{T=90(0.868126)}}}
{{{T=78.3}}}
b) {{{T=90(0.98)^x=30}}}
{{{0.98^x=1/3}}}
{{{x=log((1/3))/log((0.98))}}}