3. While investigating the half-life of a radioactive isotope, the following data was gathered. Graph the data; this graph should resemble the graph from your lab. Notice that you have a y-value at x = 0. This is called a decay curve. Time (h) Mass Remaining of the Isotope (g) 0.0 40.00 3.0 20.00 6.0 10.00 9.0 5.00 12.0 2.50 15.0 1.25 18.0 0.63 *Insert Graph Here* Answer the following questions: a. Approximately how much mass remains after 10.0 hours? b. Approximately how much mass remains after 28.0 hours? c. What is the half-life for this isotope? 4. We are simulating the decay of a radioactive substance with pennies. Do you think this it is a reasonable simulation? Explain your answer. 5. If we assume that the radioisotope used in question 3 is Lawrencium-133, the sample will contain 3.621 E23 atoms of Lawrencium. Compare your graph from question 1 with your graph from question 3. Is there a difference in how the data fits the curve? Explain your