Avendor buys milk at a certain price, adds water and sells the adulterated milk at the same rate as he bought it for. he makes a 30% profit. what is the percentage of water that he adds to milk?

options:
a) 30%
b) 15%
c) 20%
d) 60%

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