Answer:
25.00 for x = 0
Explanation:
We aren't told the range of x, nor of any "initial value" of x. If we assume this is the start of a sequence and that x is the number of that sequence, we can say that the initial value of x is zero (0). We can then say that:
y = 25.00^x becomes y = 25.00^0
Any number raised to the zeroth power is 1.
The initial value would be 25.00 for a sequence of x starting at x=0.