Step-by-step explanation:
You find the complex conjugate simply by changing the sign of the imaginary part of the complex number.
the answer is
9+3i
3/45 = 20/x...3 in to 45 seconds = 20 in to x seconds
cross multiply
(3)(x) = (45)(20)
3x = 900
x = 900/3
x = 300...300 seconds (or 5 minutes)to fill the tub with 20 inches
ummm there's nothing attached
