Answer
$f=13.1 MHz$
Work Step by Step
We can determine the circling frequency from the following formula
$f=\frac{qB}{2{\pi}m}$
We plug in the known values to obtain:
$f=\frac{1.6\times 10^{-19}(467\times 10^{-6})}{2(3.1416)(9.109\times 10^{-31})}$
$f=13.1\times 10^6$
$f=13.1$ MHz
