Part A:
5^3 * 5^-4
5^3-4
5^-1
1/5 or 0.2 (less than one)
Part B:
3^5/3^-6
3^5-(-6)
3^11
177147 (greater than one)
Part C:
1/4^2 * 1/4^3
1^2/4^2 * 1^3/4^3
1/16 * 1/64
1/1024 (less than one)
Part D:
(-7)^5/(-7)^7
-7^5-7
-7^-2
1/49 (less than one)
Best of Luck!