Anand knows from experience that if he does not review a new vocabulary word that he has learned, that he has a 70% percent chance of forgetting it each day. Let D be the number of days Anand goes without reviewing a word until he forgets it. Find the probability that it takes Anand 4 or more days to forget the word.
You may round your answer to the nearest hundredth.
P(D\geq 4)=P(D≥4)=P, left parenthesis, D, is greater than or equal to, 4, right parenthesis, equals