You can put this solution on YOUR website!
Your question could be interpreted as either 4^(5/2) or (4^5)/2
The 1st case has "5/2" as the exponent.
The 2nd case is all of "4^5" over top 2.
If we go with the 1st option, then,
4^(5/2)
= ( 4^(1/2) )^5
= ( sqrt(4) )^5
= ( 2 )^5
= 32
Or, if it's the 2nd option,
(4^5)/2
= (1024)/2
= 512