Question

5x10^8(9x10^-6+3x10-5)

Answer 1

$5.10^{8}.(9.10^{-6}+3.10^{-5}) \\ \\ 5.10^{8}.9.10^{-6} + 5.10^{8}.3.10^{-5} \\ \\ 45.10^{2}+ 15.10^{3} = 4500 + 15000 = 19500$

Espero ter ajudado.