shelbyblanchard15, this is the solution:
e. (7 * 10^6) * (8 * 10^5) = 5.6 * 10 ^12
f. 10,000,000 * 0.000 005
10,000,000 = 10 ^7
0.000 005 = 5 * 10 ^ -6
5 * 10^1 = 5 * 10
g. 30,000/0.0004
30,000 = 3 * 10^4
0.0004 = 4 * 10^-4
3 * 10^4/4 * 10^-4 = 7.5 * 10^7