Question

Please help me out with this

Answer 1

To convert minutes in hours, you have to divide by 60.

We can distribute this division in a smart way: since $60=6\times 10$, we have

$\dfrac{19.2\times 10^8}{6\times 10} = \dfrac{19.2}{6} \cdot \dfrac{10^8}{10} = 3.2 \cdot 10^7$