What is the square root of 36​

The solution set for 5v2 – 125 = 0 is

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1

The moats separating people from the animals are 5 m wide for lions and 4 m wide for the elephants. if the lion’s moat is 4 m deep, how deep should the elephants’ moat be?