Astore display rotates 40 times every half hour. how many times will the display rotate in 4 hours? 80 160 320 640

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? mark this and return save and exit