Question

A bowling ball has a mass of 7.0 kg, a moment of inertia of 2.8 × 10−2 kg⋅m2 and a radius of 0.10 m. If it rolls down the lane without slipping at a linear speed of 4.0 m/s, what is its total kinetic energy?

Answer 1

You might start here:

http://www.dummies.com/education/science/physics/how-to-calculate-rotational-kinetic-energy/

Answer 2

Ke = (1/2) m v^2 + (1/2)I omega^2

you have everything there but omega, the angular speed, but you know that
omega = v/R = 4.0/0.10 = 40 rad/second