Find the product of (x + 7)(x - 7)

The number of electoral votes each state is assigned is determined by the size of its population every ten years. the chart shows the number of electoral votes california was assigned each decade of the past century. what is the 3rd quartile of the data?

How do you answer this question? (step by step)

(if f(x)=4x^2 and g(x)=x+1, find (f o g)(x)