Question

How many kilometers is 5.82 x 10⁴ cm?

Answer 1

$1km=1000m=10^3m\\\\1m=100cm=10^2cm\\\\1km=10^3\times10^2cm=10^5cm\Rightarrow1cm=10^{-5}km\\\\5.82\times10^4cm=5.82\times10^4\times10^{-5}km=5.82\times10^{4-5}km=5.82\times10^{-1}km\\\\\boxed{5.82\times10^4cm=5.82\times10^{-1}km=0.582km}$