Synthesis(S) defention?

What are the first 4 terms in the multiplication pattern given by the formula 2×4n

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

33 ! use the following data to determine the type of function (linear, quadratic, exponential) that best fits the data set. (1, 2) (5, 7) (9, 8) (3, 4) (4, 5) (2, 3)