The nyc parks department is designing a rectangular athletic field for a new park in brooklyn. the width of the field needs to be 10 feet shorter than the length, and the perimeter of the field needs to be 80 feet. what is the length of the new field?

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)

Arectangular courtyard is 12 feet long and 8 feet wide. a tile is 2 feet long and 2 feet wide. how many tiles are needed to cover the courtyard?

Dana wants to identify the favorite professional baseball team of people in her community. she stands outside a local sporting goods store and asks every other person who enters, "what is your favorite professional baseball team? " will the results of her survey be valid? explain.