Which part of the human respiratory system has the same function as a humidifier

David must install fencing around a lot that is shaped like a right angle.the side of lot that runs east-west is 200 ft long.the side of the lot runs north-south is 125 ft long.calculate how many feet of fencing he will need to surround the entire lot.

If 2(a^2+b^2)=(a+b)^2 then, > a+b=0, > ab=0, > a=b, > 2a=b

A. what does the point (4, 122) represent? b. what is the unit rate? c. what is the cost of buying 10 tickets?