Frequency to achieve maximum power transfer in a RLC circuit?
A general way to do this is to solve for the total complex impedance, then find the frequency that minimizes the impedance magnitude.

A more case-specific way is to notice that the resistor is in series with a series L-C.  Consider the impedance of a series L-C.  It is infinite at 0 frequency due to the capacitor.  It is infinite at infinite frequency due to the inductor.  It is actually 0 at the resonant frequency, and goes up either side of it.

Therefore use the standard formula for finding the resonant frequency of a L-C system.  At that frequency, all the voltage applied by V1 will appear across R1, and R1 will dissipate V12/R1.

Actually cranking thru the numbers is your job.