Irrational number between 9.5 and 9.7

Mario has $14.35 left in his wallet. he spent $148.43 for tablecloths. then, he spent $92.05 for napkins. how much money did mario have in his wallet to start with?

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?

Show all work to identify the discontinuity and zero of the function f of x equals 6 x over quantity x squared minus 36