Answer:
50
Step-by-step explanation:
i am sure for that.it is so easy
Answer:
50 times greater than 7.8×10^-6
Step-by-step explanation:
[tex]\frac{3.9•10^{- 4}}{7.8•10^{- 6} \\\\\\ \frac{3.9}{7.8}•10^{- 4 -(- 6)} \\\\\\\ \frac{1}{2}•10^{- 4 + 6} \\\\\\ \frac{1}{2}•10^2 \\\\\\ \frac{1}{2}•100 \\\\\\ \frac{100}{2} \\\\\\ 50[/tex]
I hope I've helped you.
