Chemistry has a great deal to do with calculus. Reaction rates, statistical mechanics, and physical chemistry are a few off the top of my head. That's where all

Chemistry has a great deal to do with calculus. Reaction rates, statistical mechanics, and physical chemistry are a few off the top of my head. That's where all those equations we memorize come from. Sure we could just learn the equations, but then what happens when we run into something that doesn't fit the neat assumptions that were made for that particular equation? Statistics uses calculus heavily as well. It's hard to determine the probability of something lying in a range of a standard distribution without integrals. On the other hand, 90% of the people going through college that take calculus are there to get education to do a job that requires little to no calculus. The hard part is predicting which 10% we should educate. Teaching calculus leaves the option open for that 10% to do the jobs that need it.