Linear Algebra is so cool

I've seen calculus used the most in fluid mechanics homework. The rest of it is more than likely to be found in derivations of concepts or burried beneath the depths of tons of reference tables (which actually saves you a lot of time while making you dumber). I'd say I'm pretty rusty at calculus if you were to ask me to try stuff, although I might be able to BS my way back into confidence, though calculating second moments of intertia would be the closest thing to actual calculus use in the field. Unsurprisingly though, a good majority of soil mechanics and traffic engineering is derived empirically, as well as some other fluids equations/charts.

That's as far as I know though, being a senior in CE (Civil Engineering).