What are the factors of x^2 - 81
(x + 9)(x -9)
(x-9)(x -9)
(x + 3)(x - 27)
prime

Apool measures 12.3 feet by 16.6 feet. if the longer wall of the pool has a diagonal of 17.8 feet, what is the volume of the pool? (round to nearest tenth)

What is the circumference of a circle with an area of 50.24 cm²?

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air