SOMEONE HELP ME PLEASE I NEED HELP ASAP! PLEASE SHOW UR WORK

What is the area of triangle abc if a = 8, b = 11, and c = 15?

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

What is the value of the product (3-2i)(3+2i)?