What Is the Correct Formula for Calculating Average Power in an AC Circuit?

[Tekee]

Homework Statement

Given resistance of circuit 68 W, I(max) = .191 A, V(max) = 22.5, what is the average power of this circuit?

Homework Equations

P(avg) = I(avg)V(max)

The Attempt at a Solution

I took .191 and divided by sqrt(2) to get the rms current and multiplied by the max voltage 22.5. Not getting the right answer, though...

 

[rl.bhat]

P(avg) = I(avg)V(max)
It should be
P(avg) = I(avg)V(avg)