Basically everything picture PLEASE HELP ASAP​

We must first determine the shape of a rectangular prisms _ a0 to find area of the prism

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

You dug a hole that was 8 feet deep. after taking a short break, you dug down 3 more feet in the same hole. when finished digging, a tractor accidentally filled the hole with 4 feet of dirt. how deep is your hole now?