Answer:
This has already been answered correctly, but I'll add an additional perspective. The log of (0.0001 to the base 10 is -4.
Explanation:
log(base 10) says give us an exponent, x, that would be required to make
equal to a specified number, in this case 0.0001.
= 1
= 10
= 0.1
= 0.01
= 0.0001
The log of (0.0001) to the base 10 is -4.