The monthly sales volume y (in thousands of dollars) is related to monthly advertising expenditures x (in thousands of dollars) according to the equation $y = \frac { 100 x } { x + 10 }$ Spending how much money on advertising will
Result in sales of at least $50,000 per month?
A) At least $5000
B) Between $5000 and $10,000
C) At least $10,000
D) At least $7500

Question

Quizplus · Accepted Answer

To achieve sales of at least $50,000, solve the inequality $ \frac{100x}{x+10} \geq 50 $. Solving gives $ x \geq 10 $, meaning at least $10,000 should be spent on advertising.

The Monthly Sales Volume Y (In Thousands of Dollars) Is y=100xx+10y = \frac { 100 x } { x + 10 }y=x+10100x​

The Monthly Sales Volume Y (In Thousands of Dollars) Is $y = \frac { 100 x } { x + 10 }$