Write z = 5 + 2i as an ordered pair in an Argand diagram

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

What is the domain of the given function? {(3,-2), (6, 1), (-1, 4), (5,9), (-4, 0); o {x | x= -4,-1, 3, 5, 6} o {yl y = -2,0, 1,4,9} o {x|x = -4,-2, -1,0, 1, 3, 4, 5, 6, 9} o y y = 4,-2, -1, 0, 1, 3, 4, 5, 6, 9}

At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?