Superman is at rest in space when he throws an asteroid that has much more mass than he does. Which moves faster, Superman or the asteroid? Asteroid

Superman

Both move at the same speed

Golf is for old men who smell

I'm pretty sure the answer is c 

The boat's velocity relative to the riverbank can be resolved into two components. the component going north is 2.7 m/s and the component going west is 1.2 m/s.we add these two vectors and then find the magnitude of the resultant to get the speed.the magnitude of the resultant vector from adding can be obtained by the pythagorean theorem.    to two significant figures, the boat's speed relative to the riverbank is 3.0 m/s.