A pleasant example of calculus

There are so many complains of what's-the-use-of-math beyond the 4 basic operations and perhaps fractions.

Here is one answer: you get more powerful tools to explain things, such as why days are getting longer in a hurry, as featured in this pleasant article: http://www.forbes.com/sites/kevinknudson/2016/03/04/the-days-are-getting-longer-in-a-hurry-calculus-explains-why.

Look, calculus may look ugly, but as the author say, "it is just formalism". The ground breaking concept of limit really isn't that hard. (But it definitely gets hard when you drill on the formalism part).

And for those who thinks calculus 101 is hard. It is ELEMENTARY, pre-requisite, baby stuff, even for a undergraduate level curriculum.

It is perfectly ok to be uneducated and uninformed.