Answer: a. 20,000
b. x = 45
Step-by-step explanation: for any digit x is equal to, you multiply that by '1,000'. in the case of (a.), you will just multiply '20 * 1,000' giving you 20,000, as for (b.), you would divide since it is already the total bottles, so '45,000 / 1,000 = 45'
