3 ms·is F logarithmic or something.?by senectus1 8y agois F logarithmic or something.?eesmith 8y agoThe conversion is F = (9/5) C + 32 . If F = C then C = (9/5) C + 32 => (1-9/5)C = 32 => C = 32/(1-9/5) = -40.