Every year a lake becomes more polluted, and 2% fewer organisms can live in it. If in 2010 there are three million organisms, write an equation relating $N$, the number of organisms (in millions), to time $t$, in years since 2010.

$N(t) =$ millions of organisms. help (formulas)
(Be sure to enter your formula in terms of millions of organisms. For example if there are 8 million organisms, then $N = 8$ (not 8,000,000).)