Tuesday

November 25, 2014

November 25, 2014

Posted by **Mario** on Wednesday, February 11, 2009 at 5:58am.

- Algebra -
**Dr Russ**, Wednesday, February 11, 2009 at 6:25amAfter 1 half life it will have 0.5 (or 1/2^1) remaining

After 2 half lifes it will have 0.25 (or 1/2^2)remaining

After 3 half lifes it will have 0.125 (or 1/2^3) remaining

After n half lifes it will have 1/2^n remaining

There is 0.086 remaining so

0.086 = 1/2^n

or 2^n=1/0.086

solve for n to give you the number of half lives

and n x 2 x 10^6 y = age of meteorite.

**Answer this Question**

**Related Questions**

algebra - The level of thorium in a sample decreases by a factor of one-half ...

algebra - 2. The level of thorium in a sample decreases by a factor of one-half ...

A.P. Chemistry - Thorium-232 undergoes alpha decay and has a half-life of 1.4 * ...

AP Calculus - An Initial amount of 100 grams of Thorium-234 decays according to ...

math - The mass m(t) remaining after t days from a 70 g sample of thorium-234 is...

chemistry - how many more neutrons does thorium-230 have then protons? how many ...

Chemistry - Uranium-238 has half life of 4.51 * 10^9 years Uranium-234 has half ...

physics - a uranium-238 nucleus may stay in one piece for billions of years, but...

Calculus - The amount of carbon-14 still present in a sample after t years is ...

science/math - write and solve an algebraic equation to find the original mass ...