Science, Maths & Technology
Understanding science: what we cannot know
...economics, engineering, medicine, and more. You can look at change over time, change in the instant of time, and you can look at the accumulation of what has happened over a period of time. Typically, people meet calculus for the first time when asked to look at a rate of change for a phenomenon that has a changing rate of change: speed, rates of infection, value of share...