Ch$.8$ Homework $($i$)$

A skater is initially spinning at a rate of $24\mathrm{.}0ra\frac{d}{s}$ with a rotational inertia of $2\mathrm{.}60kg*m^2$ when her arms are extended. What is her angular velocity after she pulls her arms in and reduces her rotational inertia to $1\mathrm{.}60kg*m^2?$

$ra\frac{d}{s}$