Answer:
Are you ok? Do you need the call 911, or is this an actual question?
Step-by-step explanation:
Answer:
I'm not gonna answer
Step-by-step explanation:
but u have to multiply and divide your answer
7978 years
Step-by-step explanation:
A = A02^(-t/hl)
where hl = half-life.
Dividing both sides by A0 and taking the logarithm, we get
ln(A/A0) = -(t/hl)ln2
or solving for t,
t= -(hl)ln(A/A0)/ln2
note that A/A0 = 0.38
t = -(5715 yrs)[ln(0.38)/ln2]
= 7978 years
