Hey guys, i am confused on this question, can somebody me?

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths

In the diagram below? p is circumscribed about quadrilateral abcd. what is the value of x