What is the greatest perimeter of a rectangle with an area of 39 square feet ?

Atriangle has sides with lengths of 10 yards, 13 yards, and 18 yards. is it a right triangle?

Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?

The paint recipe also calls for 1/4 cup of food coloring. tyler says mrs.mcglashan will also need 6 cups of food coloring. do u agree or disagree? explain.