Anyone know if 50% breast milk and 50% formula for a diet is as healthy as 100% breast milk? Wife has good /sci/ job and I'm in grad school online so it makes sense for me to stay at home. Could that ratio even be lower to 30% bm?

Engineer here. How far can I get in math by using only Riemann sums? Solving integrals any other way is difficult for me. Also I expand the sums manually because I don't know the formula for consecutive integers.

I have a calculus exam next week. How fucked am I?