Find the area of the door 80 inches by 36 inches and convert to square feet

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.

The value √10 and √15 are plotted on the number line

Can someone answer this question for me