Need someone's help to solve this problem for grade 11 college math. it's under Exponential Growth and delay. . This is an example of my teachers work. This will give you the answers.

Try the following table of Values gives the moss of a radioactive isotope over a 15 hour period t ( his) / M(Mg) a ) use the table of values O 4000 to find an exponential 2000 relation for this date b) How much mass remains 500 after 20 hrs? 250 125 C ) How long before only 31.25 ma remains ?Ary The following table of Values gives the mass of Wa radioactive isotope Cover a 15 har period 4000 7 615 13 Jboo Looo b 500 12 250 15 125 a ) Use the table of values to find an exponential relation for this date b ) How much moss remains after do his ? () How long before only 31.25 mg remains? a ) 1 b = o . 5 MA = Mo (b ) X