The Problem is 8-9 please reply back and thx for your time

Look at attachment. has all info needed. need

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

The volume of a box varies directly with its length if a box in the group has a length of 30inches and k=24 what is its volume