Question

A colony of black-footed ferrets is released by biologists into a new environment in a remote area. The initial population consists of 200 ferrets, and it is thought that the population will double every 42 months. Assuming this growth rate continues, about how many ferrets will live in this area after 12 years? 244 ferrets 19,505 ferrets 2153 ferrets 819,200 ferrets Question 13 5 pts The function A = A.e-0.00693models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. If 500 pounds of the material are placed in the vault, how much time will need to pass for only 300 pounds to remain? 70 years o o 74 years 65 years 120 years

Answer 1

was After in 42 months Initially there 200 ferrets. 42 months (i. e. 3.5 years) there will be 400 ferrets (as they increases doubly every montha) Again after 42 months (2.e. 7 years rs after initial there will be (400x2) stage) = 800 ferrets After another 42 months (i.e. after 1015 monte will be 1600 in numbers. from starting they starting are 18 months left (1.5 years to complete 12 years a In 42 moths they increases Now there 2 times . 12. 1 month 20 20 )) 2. 42 2x18 42 12 18 12 1) G times : There will be 1600+ 1600 x ult 7 2971 . It is the nearest na of option C. c is correct.