In the lunchroom there were 100 milk cartons at lunch. when lunch was over 80 cartons of milk had been purchased. what is the the ratio of the number of milk cartons purchased to the total number of milk cartons?

Is it true that product of 3 consecutive natural numbers is always divisible by 6? justifyyour answer

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?

The number of calories you burn depends on your weight. a 110-pound person burns 163 calories during 30 minutes of tennis. find the number of calories that a 190-pound person would burn during the same activity, assuming they burn calories at the same rate.