Question

How to simplify $(2.3\times {10}^{-6})(3.1\times {10}^{-2})$ in scientific notation?

Answer 1

$\left({\mathrm{2.3.10}}^{-6}\right)\left({\mathrm{3.1.10}}^{-2}\right)$

Move the decimal points accordingly to the exponent

=$0.0000023$

=$0.031$

$0.00000023\times 0.031=7.13\times {10}^{-8}$

Simplify the answer (into scientific notation)

$=-0.0000000713$