Please help this is the only question i’m confused with out of everything

Three coins are flipped. what is the probability that there will be at least two tails?

John has 1/2 pound of oranges to share with julie. if they share the oranges equally, how much will each of them have?

Someone answer this asap for the first five terms of a sequence are shown. 5, 11, 23, 47, 95, . . which recursive function defines the nth term in the sequence for n > 1? a. f(n) = f(n - 1) + 6 b) f(n) = f(n - 1) + 48 c) f(n) = 3 • f(n - 1) + 1 d) f(n) = 3 • f(n - 1) - 4