Question

1. Originally, a sample has 10g of radium with a half-life of 1620 years. a) Give an exponential
model for the amount of remaining substance and b) how much radium will be present after
2430 years?​

Answer 1

Answer:

2.5 g

Step-by-step explanation:

after 1620 = 5 g

and 2430-1620=810

so after 810 = 2.5

total left = 10 - 5 - 2.5 = 10 - 7.5 = 2.5