Here’s an example I like of a negative number times another
negative number equaling a positive number:
I have been giving away five dollars each minute.
Currently, at time t = 0, I have zero dollars, but I am continuing
to give away five dollars each minute in the form of IOU’s.
Thus, the equation for the number of dollars I have at time t is
D = -5t, where D represents dollars.
Using that equation, calculate how many dollars I had four
minutes ago.
Without giving this too much thought it seems that the answer is $20. Am I missing something?.
S. Rich
zisher@gmail.com
The fact that it was the product of two negative numbers?