How many guinea pigs fit into a pool if a pool is 9 by 4 inches

It depends on the area that each guinea pig takes up

if each guine pig takes up x area

we find the total area

area=lenth times widh

legnt=9

width=4

area=9 times 4=36

number of gunnie pigs that you can use equation:

area of guinie pigs times number of guine pigs=total area

area of 1 guine pig times x=36

divide both sides by area of 1 guinepig

x=36 / (area of 1 guinie pig)

therfor we find the number that can fit by dividng 36 by the area of 1 guinie pig