Is expected year of graduation qualitative or quantitative? Is it nominal, ordinal, interval or ratio?

Find the area of the triangle formed by the origin and the points of intersection of parabolas y=−3x^2+20 and y=x^2−16.

Jason went to an arcade to play video games. he paid $2 for every 11 tokens he bought. he spent a total of $16 on tokens. which equation can be used to determine,t, the number lf tokens jason bought

If value of cos330° is √3/2 then find tan165°.