Answer
a) -272.778 $^{\circ}$C
b) -40 $^{\circ}$C
c) 20 $^{\circ}$C
d) 38888871.111$^{\circ}$C
Work Step by Step
Let:
Celsius -$^{\circ}$ C
Fahrenheit - $^{\circ}$F
Using formula: $\frac{C}{5}$= ($\frac{F - 32}{9})$
Or,
$^{\circ}$C = $\frac{5(F - 32)}{9}$
a) Temperature = -459 $^{\circ}$F
Thus in $^{\circ}$C = $ \frac{5(-459-32)}{9}$ = -272.778 $^{\circ}$C
b) Temperature = -40 $^{\circ}$F
Thus, in $^{\circ}$C = $\frac{5(- 40-32)}{9}$ = -40 $^{\circ}$C
c) Temperature = 68 $^{\circ}$F
Thus, in $^{\circ}$C = $\frac{5(68-32)}{9}$ = 20 $^{\circ}$C
d) Temperature = 7 $\times$ $10^{7}$ $^{\circ}$F = 70000000 $^{\circ}$F
Thus, in $^{\circ}$C = $\frac{5(70000000 - 32)}{9}$ = 38888871.111$^{\circ}$C
