If a person is on an 1,800-calorie diet, then how many of their calories will come from fruit?

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?

What is the number 321,000,000 in scientific notation? also what is the number? ?

What is the the greatest common factor ?