Okay, so I need help with this math problem. The professor said the answer is $x=.000307785$
I need to find x if: $$(1-t_c)*S_f*(1-t_c)*(\frac{1}{S_f+x})<1$$
$t_c=.02\% $ and $S_f=1.3000$
The answer I am getting is $x>-0.000519948$ if I change $0.2% into a decimal and not a percentage.
Any help will be greatly appreciated. thanks