Final answer:
When y=2.5, the expression y to the power of 2 is equal to 6.25.
Step-by-step explanation:
To evaluate the expression y to the power of 2 when y = 2.5, we need to substitute the value of y into the expression and perform the calculation.
So, we have y2 = 2.52
= 2.5 × 2.5
= 6.25.
Therefore, when y = 2.5, the expression y to the power of 2 is equal to 6.25.