Respuesta :

[tex]a^{-n}=\left(\frac{1}{a}\right)^n\\\\10^{-7}=\left(\dfrac{1}{10}\right)^7=\dfrac{1}{10,000,000}=0.0000001\\\\2.93\times10^{-7}=2.93\times0.0000001=\boxed{0.000000293}[/tex]