I'm soo confused x(

"Spider Industries is a U.S.-based company that test-marketed an electronic cobweb destroyer in Japan. The company's revenue, R, is a function of the number of destroyers sold, x, using the following formula R = 160x -0.2x2.

How many destroyers must the company sell to maximize its revenue?

(Hint: Think about the graph of this function and the information it gives. What properties of this graph can help answer the question?)"

???
I don't really understand the question???

Question

I'm soo confused x(

"Spider Industries is a U.S.-based company that test-marketed an electronic cobweb destroyer in Japan. The company's revenue, R, is a function of the number of destroyers sold, x, using the following formula R = 160x -0.2x2. 

How many destroyers must the company sell to maximize its revenue? 

(Hint: Think about the graph of this function and the information it gives.  What properties of this graph can help answer the question?)"

???
I don't really understand the question???

anonymous · Answer

Nevermind! I graphed it online instead of my calculator, and I got a parabola! So, for anyone else needed help with this question in the future, graph it and you will see that the max is at 400!

anonymous · Answer

*needing