0 Question 2 [3 0/1 pt '0 3 2:5 19 (9 Details The half-life of Radium-226 is 1590 years. If a sample contains 400 mg of Radium-226, how many mg will remain after 4000 years? Submit Question 0 Question 3 [1/ 0/1 pt '0 3 2:3 19 CD Details A wooden artifact from an ancient tomb contains 30 percent of the amount of Carbon-14 that is present in living trees. How long ago, to the nearest year, was the artifact made? (The half-life of Carbon-14 is 5730 years.) Question Help: El Video Submit Question 0 Question 4 [1/ 0/1 pt '0 3 2:3 19 CD Details Solve the equation for x. Give an exact solution if possible otherwise give an approximation to 3-decimal places. 12000 = 180000.23)\" m=E The population of a city is modeled by the formula P = 500000(1.02)t people after t years. How long will it take the population to reach 600000? bl