Pls help i give branliest ez math pls help

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

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great

What is the approximate difference in tenths between √12 and √15?