how much material do i need to cover a square piece foam ten inches thick and 28 inches wide and have a zipper put in it

If 20% of a number is 35, what is 50% of that number?

If i have 20$ and i gave 5$ away how much i got

Which questions would most a reader identify the author's purpose for writing? check all that apply. what type of text is this? what type of reviews did the book receive? how many copies of the book have been sold? what is the central idea? how does this text make one feel?