Final answer:
The correct calculation of the profit on 800 units using the given function P(x) is P(800) = 800^3 - 3(800)^2 + 12, which corresponds to option A.
Step-by-step explanation:
To find the profit on 800 units for the given function P(x) = x^3 - 3x^2 + 12, we need to calculate P(800). Following option A, we substitute x with 800 in the profit function:
P(800) = 800^3 - 3(800)^2 + 12
This results in calculating the cube of 800, then squaring 800 and multiplying by 3, and finally adding 12. The correct calculation based on the given function should be:
P(800) = 800^3 - 3(800)^2 + 12
Therefore, the correct answer is option A.