Answer: 1 minute
Step-by-step explanation: Michelle jumped from the plane at the altitude of 1000 m. To find the half way point, from the plane she jumped from and the ground; all you have to do is cut the altitude in half:
1000/2 = 500m which Is labeled at 1 minute
Meaning that it took 1 minute for her to be halfway from the ground
I have done this problem and taken the test, it is 100% correct
Good luck hope it helps! :D