Answer: A) is the right answer. [tex]6.9\times10^{5}[/tex]
Step-by-step explanation:
Given product : [tex]2.3\times10^{-3}\times3\times10^8[/tex]
To multiply above expression, first we need to combine like terms and then we need to use the law of exponents.
[tex]2.3\times3\times10^{-3}\times10^8\\=(2.3\times3)\times(10^{-3}\times10^8)\\=6.9\times10^{-3+8}......[\text{by law of exponents }a^n\cdot\ a^m=a^{m+n}]\\=6.9\times10^{5}[/tex]
Thus, the answer is [tex]6.9\times10^{5}[/tex].
