Felipe surveyed students at his school. He found that 78 students own cell phones and 57 of those students own an MP3 player. There are 13 students that do not own a cellphone, but own an MP3 player. Nine students do not own either device. Construct a two-way table summarizing the data.

At school there are 526 students and 263 are girls about how likely is it that a randomly chosen student will be a boy

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?

What is the absolute value of -100000000000000?