Find the surface area of the rectangular prism (type the number only)
2.6
4.2 ft
6.8 ft
HELP

If you want to place an 8 ½ inch towel bar in the center of a door that is 25 ½ wide, how much space will be on each side of the towel bar?

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.

In the equation sqrt(n+5)-sqrt(11-10)=1. what is the value of n