195k views
1 vote
The Grand Canyon is approximately 29 kilometers long. Mariner Valley is a canyon on Mars that is approximately 212 kilometers long. About

longer is Mariner Valley than the Grand Canyon?
2
O 2^3
O 2^21
O 2^108

User Dave Ray
by
4.8k points

1 Answer

5 votes
I’m not sure if I’m correct but I think it is 2^21
User Jarek Kulikowski
by
6.3k points