Question 212343
The decay of 422 mg of an isotope is given by {{{A(t) = 422e^(-0.016t)}}}, where t is time in years. Find the amount left after 17 years. Does anybody have any pointers about how to input these values on a scientific calculator?
<pre><font size = 4 color = "indigo"><b> 
On a TI-83 or 84, type this on the main screen:

422e^(-0.016*17)

Press ENTER

and read 321.5024982 or about 321.5 mg left

Edwin</pre>