Khan/khan-exercises — pull request #43432 by petercollingridge (2013-03-17 18:38:14+00:00)
Title: Rewrite rate problem hints

On my 100th attempt, I think I have a clean pull request.

I've rewritten the hints for this problem so they should be clearer and they now don't refer to equations by their colour.

Should address #42217, #43375, #43310, #43264, #41965, #43265, #32161