Calculate the rates off radioactive decay if the following percentages of radioactive material is found in fossils or rocks
1. C14 at 65%
2. C14 at 15%
3. K40 at 30%
4. K40 at 15%

answer at the divergent plate boundary in the middle of the ocean;

b. 20: 5

explanation:

20% of the worlds population lives in southwest asia, and less than 5% of the world's

land area.