If you could know that a fossil that is 10,000 years old started with 20 mg of carbon-14, how much would you expect that same fossil to have today?

The half life of Carbon 14 is 5730 years. By substituting the given figures to the formula x=I(1/2)^n where x is the amount of the remaining material, I is the initial amount and n is the quotient between the time elapsed and carbon 14's halflife. You will arise with the formula x=20(1/2)^1.745. You will get 5.97 mg.

It's cell theory. easy name i would think.

If you get a map and put the countries a states all together it forms all one piece you can also tell because of the earth quakes