Order these numbers from least to greatest. 579 , 5.45 , 5.451 , 234

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?

How can (square root of 25) ^2 be rewritten?

Having a hard time understanding this question (see attachment).