Final answer:
The expression represents a quadratic equation that calculates the company's income based on the number of units sold.
Step-by-step explanation:
The expression -4x^2 + 10000x represents a quadratic equation. In this equation, 'x' represents the number of units sold by the company, and the expression calculates the company's income by subtracting the product of 4 times the square of 'x' from the product of 10000 times 'x'.
For example, if the company sells 100 units, we can substitute 'x' with 100 in the equation to calculate the income.
Income = -4(100)^2 + 10000(100)
Income = -4(10000) + 1000000
Income = -40000 + 1000000
Income = $960,000.