In Larry Niven's science fiction novel Ringworld, a ring of material or radius 1.54 × 1011 m rotates about a star with a rotational speed of 1.44 × 106 m/s. The inhabitants of this ring world experience a normal contact force n. Acting alone, this normal force would produce an inward acceleration of 9.38 m/s2. Additionally, the star at the center of the ring exerts a gravitational force on the ring and its inhabitants. What is the total centripetal acceleration of the inhabitants?