Arkin norris made a $1,200 deposit on april 1 at his bank. the bank pays 2.25% compounded quarterly
on july 1, october 1, and january 1. what was his balance on january 1?

Can somebody me out with this question

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?

Three times the sum of a number and seven is negative thirty-six. what is the number?