Calculate cos0 to two decimal places

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

10x − 5y + 14 = 0 whats the answer pls

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