Question

3 × 10 elevado a -6
4 × 10 elevado a 5

Answer 1

Espero ter ajudado.

A $3\cdot \:10^{-6}=3\cdot \frac{1}{10^6}=\frac{3}{10^6}=\frac{3}{1000000}=\boxed{0.000003}$

B $4\cdot \:10^5=4\cdot \:100000=\boxed{400000}$