Question

A formula is expressed as D= a(2+kt). Express k in terms of D,a, and t.

Answer 1

This is just rearranging terms, it gets kind of ugly though. Start by dividing both sides by a to get D/a=2+kt, next move the 2 over to the left to get (D/a)-2=kt, finally divide the whole expression by t to get ((D/a)-2)/t=k