A tennis supply store pays a wholesaler $90 for a tennis racquet and sells it for $170. What is the markup rate? (Quantity)

Markup is the difference between the cost of a good or service and its selling price. A markup is added to the total cost incurred by the producer of a good or service in order to create a profit. The total cost reflects the total amount of both fixed and variable expenses to produce and distribute a product. So it would be 144 - 90 = 54. $54 would be the markup.

Step-by-step explanation:

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50