Answer:
2 * 10 ^3 or 2000
Step-by-step explanation:
To determine how many times as great, divide
8 * 10 ^-3
-------------------
4 ^ 10 ^-6
First divide the numbers
8/4 = 2
Then for the exponents, we know a^b / a^c = a^(b-c)
10^-3 / 10 ^-6 = 10 ^ (-3 - - 6) = 10 ^ (-3+6) = 10 ^3
Put back together
2 * 10 ^3
