Thursday

August 21, 2014

August 21, 2014

Posted by **Darwin12** on Wednesday, December 12, 2012 at 6:54pm.

A. 25 years

B. 24 years

C. 20 years

D. 29 years

**Related Questions**

Math - In 10 years, 25% of a radioactive substance decays. What is its half-life...

Calculus - The half life of a certain radioactive substance is 10 years. How ...

calculus - The rate at which an amount of a radioactive substance decays is ...

precal - If the half-life of a certain radioactive substance is 2000 years, ...

Science - A material has 32 atoms in all; 24 decayed and the rest undecayed. If ...

Science - If a 20 gram sample of a radioactive substance has a half-life of 6000...

Physics - Suppose you have 100 g of radioactive plutonium-239 with a half-life ...

Physics - Suppose you have 100 g of radioactive plutonium-239 with a half-life ...

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

Environmental Science 11th grade - If half of a quantity of radioactive ...