Why is the line integral over a conservative vector field 0

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.

Find the solutions for a triangle with a =16, c =12, and b = 63º

Can someone me do math because i am having a breakdown rn because i don’t get it