About 1 billion according to the photo
Answer:
This is late as heck but for the others looking for this you can use Socratic and look up the answers individually and they’ll pop up one by one. Also if you need to do other gizmos try the app studocu it has a lot of free gizmos that’s already answered.
Answer:
it will be 10Hz ,because number of waves per second is 10 so we divide with 1second
Ocks are what make up the earth, and part of what erodes it
