A worm is at the bottom of a 12 ft. wall. Every day it crawls up 3 ft., but at night it slips down 2 ft. How many days does it take the worm to get to the top of the wall?
On day 10 it will reach the top.
(9 + 3) = 12
On day 10 it will reach the top.
(9 + 3) = 12