Posted by **Anonymous** on Friday, April 26, 2013 at 11:11pm.

Andrew measures they amount of a very unstable substance to be 100 moles. the half life of this substance is 3 days(after 3 days, half is gone).

write an exponential function that models this situation where Y is the amount of substance and X is time in days.

use your equation for problem 28 to complete the chart.

- algebra -
**Reiny**, Friday, April 26, 2013 at 11:15pm
amount = 100 (1/2)^(t/3) , where t is in days

No idea what problem 28 is, so .....

- algebra -
**Anonymous**, Wednesday, May 15, 2013 at 3:12pm
0=100

3=50

6=25

9=12.5

12=6.25

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