hope uses the equation C= 3h + 9 to find the total cost C, in dollars, of renting a bike for h hours. If hope does spend more than $30, what is the maximum number of hours she can rent the bike?

Two friends are reading books. jimmy reads a book with 21,356 words. his friend bob reads a book with one-and-a-half times as many words. which expression represents the number of words bob reads?