Answer:
The answer is C.
Step-by-step explanation:
In order to find the value of m, you have to eliminate -10 on the right side by adding 10 to both sides :
8 = -10 + m
8 + 10 = -10 + m + 10
18 = m
m = 18
5 x 108. The purpose of scientific notation is for scientists to write very large, or very small, numbers with ease.