Loge 70.81 = a
Log to the base e is also written as ln
ln 70.81 = a
Yes, to convert the ratio into the percentage, divide, the multiply the result by 100, and there is your answer !!.
36 / 9 = 4
Answer : 4 play areas.
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
