Ihow can i write all the names that apply to 7/8 0 5.45 0.75 -18/6 and square roots of 24 36 and -100

To classify all of these numbers, you could say all real numbers if not for the square root of -100, as it is 10i, which is an imaginary number. The only classification that applies to all of these these numbers is "All real and imaginary numbers"

The household makes $424.45