Answer
4 $\times$ $10^{-5}$
Work Step by Step
You have $\frac{3.6 *10^-{^1}{^0}}{9 * 10^-{^6}}$.Simplify:
$\frac{3.6 *10^-{^1}{^0}}{9 * 10^-{^6}}$ -subtract the exponents-
$10^{-10-(-6)}$=$10^{-4}$
$\frac{3.6}{9}$ $\times$ $10^{-4}$ -divide the terms-
0.4 $\times$ $10^{-4}$ -write the number in the correct format by moving the decimal over and subtracting -1 from the exponent-
=4 $\times$ $10^{-5}$
