Plss help I legit don’t really understand and I’m looking at my notes

Solve with work adding cheese to a mcdonalds quarter pounder increases the fat content from 21g to 30g. what is the percent of change ?

Nine people are going to share a 128-ounces bottle of soda. how many ounces will each person get drink? choose the correct equation and answer for this situation

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if