question archive A certain element has a half life of 1
A certain element has a half life of 1
Subject:MathPrice: Bought3
A certain element has a half life of 1.5
1.5 billion years.
a. You find a rock containing a mixture of the element and lead. You determine that 55
55?% of the original element? remains; the other 45
45?% decayed into lead. How old is the? rock?
b. Analysis of another rock shows that it contains 15
15?% of its original? element; the other 85
85?% decayed into lead. How old is the? rock?
