Question

Help please

Answer 1

a) if 18 minutes have passed, and the half life is 6 minutes, then how many half lives have passed?

Answer 2

3

Answer 3

awesome

so if there are 8 g initially how much will be left after ~3~ half lives? you must divide 8 in half three times

Answer 4

2

Answer 5

almost

8(1/2)^3 = ?

Answer 6

1

Answer 7

good so only 1g left

b) if 1/4 of the original c-14 is still left how many half lives have passed? as a hint start with 1 and see how many divisions by 2 it takes to get to 1/4

Answer 8

2?

Answer 9

awesome so if 2 half lives have passed how old is the artifact?

Answer 10

1

Answer 11

if the half life of c-14 is 5730 years, how old is the artifact?

Answer 12

11460

Answer 13

good so that's it for b