-kt (a) If 25% of the Sr remains in the body after 90 days, write a...

Transcribed Image Text:

-kt (a) If 25% of the Sr remains in the body after 90 days, write a function of the form Q(t)=Qe to model the amount Q (t) of radioactivity in the body t days after the initial dose. Round the value of k to five decimal places. Do not round intermediate calculations. -0.01540 Q(t)=4e Alternate Answer: Q(t)=4e -0.01541 Part: 1/2 Part 2 of 2 (b) What is the biological half-life of Sr under this treatment? Round to the nearest day. Do not round intermediate calculations. 89 The biological half-life of Sr is approximately days. X 5 -kt (a) If 25% of the Sr remains in the body after 90 days, write a function of the form Q(t)=Qe to model the amount Q (t) of radioactivity in the body t days after the initial dose. Round the value of k to five decimal places. Do not round intermediate calculations. -0.01540 Q(t)=4e Alternate Answer: Q(t)=4e -0.01541 Part: 1/2 Part 2 of 2 (b) What is the biological half-life of Sr under this treatment? Round to the nearest day. Do not round intermediate calculations. 89 The biological half-life of Sr is approximately days. X 5