Apool shaped like a rectangle prism is 40 feet long, 20 feet wide, and 4 deep. attached to the side of the pool is a hot tub with 1/4 the volume of the pool. what is the total volume of the pool and hot tub?

Lets start with finding the volume of the pool

The formula for the volume of a rectangular prism is

V=l*w*h     where l=length  w=width and h=height
plug in the data we know
V=40*20*4
V=3200ft³

Now for the hot tub.

3200ft³*1/4=800ft³

Add the volumes together
3200+800=4000ft³

Answer=4000ft³

The answer is $9.90 with rounding to the nearest tenth