Question

Carbon-14 has a half of 5,730 years. If a sample contains 70 mg originally, how much is left after 17,190?

Answer 1

BELOW

Step-by-step explanation:

Find the number of half lives: 17190 / 5730 = 3

Equation: 70 mg * (1/2)^3 = 8.75 mg

Or 70 then 35 after one half life then 17.5 then 8.75 mg