Ask Me Help Desk - the equation is N=O(0.5)t/h

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the equation is N=O(0.5)t/h

Trying to help my nephew over the phone. He says h is 30 years, we have 500 grams of element-90 and 60 years has passed

Just... use the equation?

$N = O(0.5)^{t/h}$

h = 30
N = 500
t = 60

Find O.

Thank you. Seems so easy now.

You're welcome :)

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