Any help with the following three homework questions would be appreciated:

Make T the subject:

E = 800(T – 20)

Simplify

(2pq3)4

2pq to the power of 3 to the power of 4

Evaluate

5-2 x 1000.5

Five to the power of minus 2 x 100 to the power of 0.5

Apologies for not being sure which form topic to put these questions under. Any help would be greatly appreciated.