Convert the following temperature readings: i) 37°C to °Fahrenheit ii) 40°C to °Fahrenheit iii) 100°Fahrenheit to centigrade

$F = C \times \frac{9}{5} + 32$.

$$F = 37^\circ C \times \frac{9}{5} + 32$$

$$F = 37 \times 1.8 + 32$$ $$F = 66.6 + 32$$

$$F = 98.6^\circ F$$

The converted temperature is $\boxed{\text{98.6}^\circ F}$.

$F = C \times \frac{9}{5} + 32$.

$$F = 40^\circ C \times \frac{9}{5} + 32$$

$$F = 40 \times 1.8 + 32$$ $$F = 72 + 32$$

$$F = 104^\circ F$$

The converted temperature is $\boxed{\text{104}^\circ F}$.

$C = (F - 32) \times \frac{5}{9}$.

$$C = (100^\circ F - 32) \times \frac{5}{9}$$

$$C = \frac{340}{9}$$ $$C \approx 37.78^\circ C$$

The converted temperature is $\boxed{\text{37.78}^\circ C}$.