Solve these questions. Pls show your work.

Alcoa was $10.02 a share yesterday. today it is at $9.75 a share. if you own 50 shares, did ou have capital gain or loss ? how much of a gain or loss did you have ? express the capital gain/loss as a percent of the original price

Build is 120 wide 20 feet high 48 feet long how many cubic feet and the volume

Which angle is the smallest? also give me an explanation so i can complete it to other questions as well, : )