0
$\begingroup$

Here's my question:

A rumour spreads exponentially through a college. 100 people have heard it by noon, 200 by 1pm. How many people have heard it

a) by 3pm b) 12.30pm c)1.45pm

thanks in advance.

  • 0
    do you know the equation for exponential growth?2012-05-13
  • 0
    In other words, it doubles every hour. That should get you 3:00 PM easily.2012-05-13

1 Answers 1