Jamal's scores on the first three of four 100-point english papers were 86, 92, and 89. what score does he need on his fourth paper to ensure an average score of at least 90?

Jack lives on a farm and has a large backyard. the area of his rectangular backyard is of a square mile. if the width of the yard is of a mile, what fraction of a mile is the length of the rectangular backyard?

What is the interquartile range of this day at set?

There are 8 movies that you would like to see currently showing in theatres. in how many different ways can you choose a movie to see this saturday and one to see this sunday?