Owen Duffy wrote:
"Work this example through with your textbook."

Don`t need the textbook. I`ve been working these for over 60 years.

Pythagoras gave us the solution in ancient times when electricity was
produced by rubbing an amber rod with an animal pelt. The impedance is
close enough to 120 ohms.

I=E/Z
E= 1 ampere

Power=Isquared x R
Power = 85 watts

Best regards, Richard Harrison, KB5WZI