The half-life of Radium-226 is 1590 years. If a sample contains 200 mg, how many mg will remain after 4000 years? Round your answers to 3 decimal places when necessary. mg Check Answer 0 Question 17 [3 0/3 pts '0 2 6) Details Round your answers to 3 decimal places when necessary. At the beginning of an experiment, a scientist has 200 grams of radioactive goo. After 180 minutes, her sample has decayed to 3.125 grams. What is the half-life of the goo in minutes? C] Find a formula for G(t), the amount of goo remaining at time t. G(t) = How many grams of goo will remain after 2 minutes? C] Check Answer 0 Question 18 [3 0/3 pts '0 2 6) Details Round your answers to 3 decimal places when necessary. The doubling period of a bacterial population is 15 minutes. At time t = 120 minutes, the bacterial population was 9000. What was the initial population at time t = 0? Find the size of the bacterial population after 4 hours