If X-5 power of 10 = 1, then 2x-8 power of 2 =?

If X-5 power of 10 = 1, then 2x-8 power of 2 =?

The 0 th power of 10 = 1
So X-5 = 0
x=5
Then 2x-8 = 2
So 2x-8 power of 2 = 4