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Mathematics 7 Online
OpenStudy (anonymous):

Hey guys I need help setting this up. Thanks! This exercise uses the radioactive decay model. Radium-221 has a half-life of 30 sec. How long will it take for 96% of a sample to decay?

OpenStudy (anonymous):

HINT: Radium-221 has a half-life of 30 sec. What does that mean? Well, that means that exactly after 30 seconds you have half of what you had 30 seconds ago.

OpenStudy (anonymous):

Look at http://tutorial.math.lamar.edu/Classes/Alg/ExpLogApplications.aspx towards the bottom it has an exponential decay and growth section

OpenStudy (anonymous):

I was using the wrong formula. Thank you!

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