The product obtained when -2 is multiplied by itself 4 times is .

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?

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

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