How many rectangles? Remember a square is a rectangle

Elena and her husband marc both drive to work. elena's car has a current mileage (total distance driven) of 15,000 and she drives 23,000 miles more each year. marc's car has a current mileage of 46,000 and he drives 9,000 miles more each year. will the mileages for the two cars ever be equal? explain.

Asphere has a diameter of 10 in. what is the volume of the sphere?

Polynomial that can be factored as (3x-4)(3x+4)