The bottom of a ladder must be placed 3 feet from a wall. the ladder is 12 feet long. how far above the ground does the ladder touch the wall

You would use the Pythagorean theorem. Lets say that how far above the ground the ladder touches the wall is x.

x^2 = 12^2 - 3^2
x^2 = 144-9
x^2= 135
x=sqrt(135)
x=about 11.6

Num of plants = (original#ofplants)*(1.6)^t