Hey, i have 2 questions. 1: Can you find a formula that describes this function? So a given rectangle has a perimeter of 16m. Can you find the area A of the rectangle as a function of the length, L, of one of its sides. The answer would look something like A= ___ m2. 2. Can you state the domain of A. That assumes the length of the rectangle is longer than its width. If you can give answer for this using interval notation.  Thank you.

OTHER APPLICATION Attitude Change Social psychologist have found that as the discrepancy between the view of a speaker and those of an audience increase to a point but decrease when the discrepancy becomes too large particular if the communicator is viewed by the audience as having low credibility, Suppose that the degree of change can be approximated by the function D(x)=x4+8x3+80x2 Where x is the discrepancy between the view of the speaker and those of the audience as measure by score on a question-naira. Find the amount of discrepancy the speaker should aim for to maximize the attitude change in the audience. Source: Journal of Personality and Social Psychology.

Find the domain of the function f(x)=142xx2