John run 30 miles in 2 hours what is the unit rate?

Anyone know? will mark brainliest if correct!

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?

If chord ab is congruent to chord cd, then what must be true about ef and eg?