Stage: 4 Challenge Level: 
Try some particular landing points.
You might find a spreadsheet useful.
smartphone. Population Dynamics. Calculus generally. Maximise/minimise/optimise. engineering. Real world. Pythagoras' theorem. Individual. Mathematical modelling. biology.
Published January 2005.
Copyright © 2007. University of Cambridge. All rights reserved.
NRICH is part of the family of activities in the Millennium Mathematics Project, which also includes the Plus and Motivate sites.
email: nrich@damtp.cam.ac.uk