Astronaut Jennifer's Lifeline to Her Spaceship Comes Loose and She

Multiple Choice

Astronaut Jennifer's lifeline to her spaceship comes loose and she finds herself stranded, "floating" 100. m from the mothership. She throws her 2.00 kg wrench at 20.0 m/s in a direction away from the ship. If she and her spacesuit have a combined mass of 200. kg how long does it take her to coast back to her spaceship?

A) 500. s
B) 250. s
C) 2.50 minutes
D) 750. s
E) 1000. s