CO2 is the emperical formula of carbon dioxide
False
A heliocentric is when the model is
representing the sun as the center
A geocentric says the earth is at the center of the universe
Answer:

Explanation:
Hello,
In this case, we need to remember that for the required time for a radioactive nuclide as radium-226 to decrease to one half its initial amount we are talking about its half-life. Furthermore, the amount of remaining radioactive material as a function of the half-lives is computed as follows:

Therefore, for an initial amount of 100 mg with a half-life of 1590 years, after 1000 years, we have:

Best regards.
Answer:
uh i think its D All of the above
Explanation:
sorry if its wrong