Question

I will show you the pic

Answer 1

we have the expression

$\frac{4.8\cdot10^8}{1.2\cdot10^4}\cdot2.2\cdot10^{(-6)}$

Solve the quotient first

so

$\begin{gathered} \frac{4.8\cdot10^8}{1.2\cdot10^4}=\frac{4.8}{1.2}\cdot10^{(8-4)} \\ \\ 4\cdot10^4 \end{gathered}$

substitute in the original expression

$\begin{gathered} 4\cdot10^4\cdot2.2\cdot10^{(-6)}=(4\cdot2.2)\cdot10^{(4-6)} \\ 8.8\cdot10^{(-2)} \end{gathered}$

the answer is

8.8x10^-2