For every 15 students there are 3 teachers in the school. Based on this information, about how many teachers are in a school with 550 students?

According to the normal model, what percent of receivers would you expect to gain fewer yards than 2 standard deviations below the mean number of yards

What is always true about a positive integer raised to a negative odd power?

Helena lost her marbles. but then she found them and put them in 44 bags with mm marbles in each bag. she had 33 marbles left over that didn't fit in the bags.