The speed of the computers is measured in number of calculations per picosecond. there are 3.6*10 to the fifteenth power picoseconds per hour. what fraction of a second is a picosecond.

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?