Answer
False. $\frac{8\times10^{30}}{4\times10^{-5}}=2\times10^{35}$
Work Step by Step
$\frac{8\times10^{30}}{4\times10^{-5}}=\frac{8}{4}\times\frac{10^{30}}{10^{-5}}=2\times10^{35}$
When you divide by a number with a negative exponent, it's the same as multiplying by that number with a positive exponent. $\frac{5}{2^{-3}}=5\times2^3$ That's why ten is to the 35th, not 25th power.
