Please help, I can't do the math.

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

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

What is the area of a triangle with vertices at (-3 3) (-3,2) and (1,2)?