SOLUTION: suppose a radioactive isotope is such that one-ninth of atoms in a sample decay after eight years. Find the half life of this isotope. Round to one decimal place.

Question 913640: suppose a radioactive isotope is such that one-ninth of atoms in a sample decay after eight years. Find the half life of this isotope. Round to one decimal place.
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
p, amount present at passage of time t, (years)
I, initial amount for any t=0
k, a constant
, the general decay model

One-ninth after 8 years.

.

The question was, find the half-life.

----------- when rounded to nearest tenth.
Rounded to ONE decimal place, 2.5 years, the half-life.
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