Which polynomial is factored completely?

a. g^5 -g

b. 4g^3+18g^2+20g

c. 24g^2-6g^4

d. 2g^2+5g+4

Suppose you are an avid reader and are looking to save money on the cost of books instead of paying about $20 for each book, you decide to look into purchasing a kindle for $120 you can purchase e-books for about $5 each 1. find the slope-intercept equation for the cost of the hard copy of books using x to represent the number of books 2. find the slope-intercept equation for the cost of the kindle with cost of e-books using x to represent the number of books