Thank you for the opportunity to help you with your question!

This Question is currently still in progress and will be
finished shortly

Please find the solution enclosed here with. In case of any doubt please feel free to ask … If you need help in any assignment of math/ science … any online exam / discussion, Please contact for quick & quality services.

Jul 16th, 2015

a. function m(t) = 23 * 2^(-t/1600) Answer

b. 0.5 = _{}e^{−r*1600} ; 0.693 = r*1600 hence r = 4.332 x 10^(-4) or 0.00043

hence we can write , m(t) = 23* e^(-0.00043 t) Answer

c. m(t) = 23 * 2^(-4000/1600) solving we get m(t) = 4.06 mg or 4 mg Answer

d. 16 = 23 * 2^(-t/1600) solving we get t = 837.699 years or 838 years Answer