Finding angle measure using triangles

Find the values of y: 3y^3(y^2+ 2/3y)=0

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?

At oaknoll school, 90 out of 270 students on computers. what percent of students at oak knoll school do not own computers? round the nearest tenth of a percent.