Sunday

January 25, 2015

January 25, 2015

Posted by **rachel** on Thursday, February 24, 2011 at 7:59pm.

- math -
**bobpursley**, Thursday, February 24, 2011 at 8:31pmdidn't I do this once? http://www.jiskha.com/display.cgi?id=1298595200

**Answer this Question**

**Related Questions**

math - Radioactive radium has a half-life of approximately 1599 years. What ...

Calc - Radioactive radium () has a half-life of 1599 years. What percent of a ...

Math - The half-life of radioactive strontium-90 is approximately 32 years. In ...

Math - The half-life of radioactive strontium-90 is approximately 28 years. In ...

Calculus - [Exponential growth & decay] The half-life of radioactive strontium-...

Calculus - The half-life of radioactive strontium-90 is approximately 31 years. ...

Precal - If 80 percent of radioactive element is left after 250 years, then what...

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

Chem 3A - please help me with this chemistry problem. Half-Life A radium-226 ...

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