Question

can i ask a question?
state atleast 3 application of calculus?

Answer 1

stokes,greens, orthoganol coordinates.

Answer 2

In a business setting:
minimizing production costs
maximizing profit
finding total expenditures
finding average consumption rates

non-business setting:
teaching logical approaches to new, varied problems (even those not having to do with math)
i used mean value theorem to not get a ticket from a police officer
used a lot in graphic design, product marketing, etc. basically anything that has to do with designing stuff over a specific area, using a certain amount of materials, etc.

good enough?

Answer 3

optimization problems
that's a big application..

Answer 4

derivatives are basically rates of change
Integrals can be viewed as summations (the inverse of derivatives basically because if you know the rate of change you could add them all together to build back the original function (that is of course if you also had one point on the original function as reference))

Basically these two ideas are so powerful that it is more like name three applications that you can't model with calculus. Obviously calculus can't pick apples for you (but nothing in math can) but it can model how to pick apples most efficiently. Now being able to create an accurate model, that's a whole other story and why people invest so much time studying calculus