> Career wise though, anything to do with financials or engineering is never going to be okay with the answer in your head being in the ballpark. Calculus is t

> Career wise though, anything to do with financials or engineering is never going to be okay with the answer in your head being in the ballpark. Calculus is the art of approximation and intuition in math. Newton couldn't have destroyed the way we used to calculate pi if he hadn't extended the binomial theorem into other sets of numbers.