I also need help on this lol please

X² + 4y² = 36 the major axis runs along: a) y=4x b) x-axis c) y-axis

How would you find the height of points on the circle? the topic is trigonometry.

The john deere company has found that revenue, in dollars, from sales of heavy-duty tractors is a function of the unit price p, in dollars, that it charges. if therevenue r is r(p)= -1/2p^2 +1900pa)how much revenue will the company generate if they sell 700 tractors? b) how many tractors does the company want to sell to maximize the revenue?