Pre-Calculus H example in class: Jacob B.¹ has a very generous bank where he accrues 100% annual interest and he can compound the interest as many times as he'd like. However Jacob only has $1 and one year.
They didn't recognize e in decimal form despite it being right under their nose. Interesting. Most realized that it would eventually not matter how many times you compound.
¹ Last name Bernoulli.