The average debt owed by college graduates after they graduate is between $24,000 and $34,000. How could this be written using a margin of error?

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

Math i have no idea how to do a and b

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