Final answer:
2.5 x 10^0 equals 2.5.
Step-by-step explanation:
2.5 x 10^0 equals 2.5. When a number is multiplied by 10 raised to the power of 0, it remains unchanged. In this case, 2.5 multiplied by 10^0 is the same as 2.5 x 1, which gives us the answer of 2.5.