A chemist has a 100 gram sample of a radioactive material He records the amount of radioactive material every week for 6 weeks and obtains the following data Complete parts a f Week x 0 1 2 3 4 5 6 Weight y in grams 100 0 82 7 66 5 56 9 45 3 37 2 30 5 Points 0 of 6 a Treating week x as the independent variable use a graphing utility to fit an expo function to the data y ab 100 4019 0 8204 Round to four decimal places as needed