What is the value of 7643 +6437 +4376 +3764?

What is the square root of 45? (step by step working plz)

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.

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?