The perimeter of a parallelogram is 68 IN. One side measures 14 In. What are the lengths of the other 3 sides?
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Answer:
Where represent the half life and the intial amount would be
And we want to find the time in order to have a 95% of decay so we can set up the following equation:
If we apply natural log on both sides we got:
And solving for t we got:
So then would takes about 14.26 hours in order to have 95% of the lead to decay
Step-by-step explanation:
For this case we can define the variable of interest amount of Pb209 and for the half life would be given:
Where represent the half life and the intial amount would be
And we want to find the time in order to have a 95% of decay so we can set up the following equation:
If we apply natural log on both sides we got:
And solving for t we got:
So then would takes about 14.26 hours in order to have 95% of the lead to decay