Find the area of a square if each side is 11 centimeters long

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?

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?

An elevator travels 310 feet in 10 seconds. at that speed, how far can't his elevator travel in 12 seconds?