Answer
=2.5 $\times$ $10^{2}$
Work Step by Step
You have the expression $\frac{3.1*10^4}{1.24*10^2}$. Evaluate the expression:
$\frac{3.1*10^4}{1.24*10^2}$=2.5$\times$$10^{4-2}$ -subtract the exponents and divide powers with the same base-
=2.5 $\times$ $10^{2}$