Answer: 1.64 x 10^19 atoms
Step-by-step explanation:
After 2018 years, the sample of c-14 will contain 1.64 x 10^19 atoms. This is calculated by using the equation A = A0 * e^(-k * t), where A is the amount of atoms present after a certain amount of time, A0 is the initial amount of atoms, k is the radioactive decay constant, and t is the amount of time that has passed. Plugging in the values, we have 1.64 x 10^19 = 2.70 x 10^19 * e^(-0.00012 * 2018). Therefore, after 2018 years, the sample of c-14 will contain 1.64 x 10^19 atoms.