The calculated minimum unit cost of the cars is $9005
How to determine the minimum unit cost of the cars
From the question, we have the following parameters that can be used in our computation:
C(x) = 0.5x² - 280x + 48,205
The x-coordinate of the vertex of the above function is calculated using
x = -b/2a
So, we have
x = 280/(2 * 0.5)
x = 280
The minimum unit cost of the cars is the y value at x = 280
So, we have
C(280) = 0.5 * 280² - 280 * 280 + 48,205
Evaluate
C(280) = 9005
Hence, the minimum unit cost of the cars is $9005