I think the best answer would be D. Dolphin!
Answer:
50.0 miles × 1.61 km = 80.5 km
Speed of train in meters per second



C.
There is 13 electrons in a aluminum atom. Looking at the picture, you can see there are two electrons in shell one, eight in shell two, and three in shell three.
The answer would be option D. can only be seperated by chemical means
Pretty sure the answer is c but not completely positive !