The biosphere is connected to the hydrosphere when

Short answer please, thank you :)

The perimeter of a rectangle is greater than or equal to 74 meters. if the length is 25 meters, the minimum width of the rectangle is meters.

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

1yd 1 ft = 1 1/12 1 1/3 1 1/2 1 1/6