Aradioactive isotope of the element potassium decays to produce argon. if the ratio of argon to potassium is found to be 31: 1, how many half-lives have occurred?

Explanation:

Argon to potassium ratio after 1 half life = 1:1

After 2 half lives = 75/25= 3:1

After 3 half lives = 87.5/12.5= 7:1

After 4 half lives = 93.75/6.25 = 15:1

After 5 half lives = 96.875/3.125 = 31/1

their crystal patterns have been disrupted by stress