Afour-digit serial number is to be created from the digits 0 through 9. how many of these serial numbers can be created if 0 can not be the first digit, no digit may be repeated, and the last digit must be 5?

we'll this would mean that the dunk tank and the bounce house are the same for 20 hours because the 2 represents that the two activities, and the 20 represents the amount of hours they both are. so with this said, it means that the answer is c. the costs for a dunk tank and bounce house are the same for 20 hours.

c.the costs for a dunk tank and bounce house are the same for 20 hours.

hope this .