My license plate is a 4-digit number. the products of the digits is 0; their sum is 9; the numbers appear in descending order; and the digit in the thousands place is the only factor of 10 and 15. find my license plate number.

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?

The amount of data left on the cell phone six gb for 81.5 gb of data is used how much data is available at the beginning of the cycle

1/2+1/6-3/4 simplify the given expression leaving the answer in improper fraction form.