Question

$\frac{(9 \times 10 {}^{9} )(7 \times 10 {}^{ - 6})}{5 \times 10 {}^{9} }$Doy CORONA y le SIGO,
Necesito ayuda con eso
​

Answer 1

$\frac{(9\times 10^{9})(7\times 10^{-6})}{5\times 10 ^{9}} = \frac{(9\times7\times10^{-6})(10^{9})}{5(10^{9})} =\frac{9\times7\times10^{-6}}{5}=\\ \\ \frac{63\times10^{-6}}{5}= \frac{6.3\times10^{-5}}{5}= 1.26\times10^{-5}$