What is the smallest power of 10 that would exceed 999,999,999,991

The green family is a family of six people. they have used 4,885.78 gallons of water so far this month. they cannot exceed 9,750.05 gallons per month during drought season. write an inequality to show how much water just one member of the family can use for the remainder of the month, assuming each family member uses the same amount of water every month.

Can someone me and plz do the problem

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out