Question

Qual a temperatura da escala fahrenheit que corresponde a 40 °C?
A) 313.
B)4,444.
C)39,2.
D)2,25.
E)104.

Answer 1

$\frac{f - 32}{9} = \frac{c}{5}$
$\frac{f - 32}{9} = \frac{40}{5}$
$5f - 160 = 360$
$5f = 520$
$f = 104$