Answer
$0.48$
Work Step by Step
RECALL:
(i) Scientific notation has the form $a(10^n)$, where $1 \le a \lt 10$ and where $n$ is an integer.
(ii) $a^m \cdot a^n = a^{m+n}$
Write each factor in scientific notation to obtain:
$=4(10^{-5}) \cdot 1.2(10^4)$
Multiply $4$ and $1.2$ together, and then multiply the powers of 10 together to obtain:
$=(4 \cdot 1.2)(10^{-5} \cdot 10^{4})
\\=4.8(10^{-5+4})
\\=4.8(10^{-1})
\\=0.48$
