Saturday
February 28, 2015

Homework Help: Calculus-Modeling Equations

Posted by Kim on Friday, March 6, 2009 at 12:08am.

An unknown radioactive element decays into non-radioactive substances. In 420 days the radioactivity of a sample decreases by 39 percent.

1.What is the half-life of the element?


2.How long will it take for a sample of 100 mg to decay to 46 mg?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

math - An unknown radioactive element decays into non-radioactive substances. In...
Chemistry - A radioactive element has a half-life of 6.41 days. What percent of ...
Pre calc - If 250 mg of a radioactive element decays to 200 mg in 48 hours, find...
math - You have just isolated a new radioactive element. If you can determine ...
advanced functions HELP!!! - Radioactive decay is the process by which an ...
Science - Choose the explanation that does the following: (1) identifies the ...
Chemistry - A certain radioactive element has a half life of 1 h. If you start ...
half-life - If 250mg of a radioactive element decays to 200mg in 48 hours, find ...
Math - You have just isolated a new radioactive element. If you can determine ...
calculus - The rate at which an amount of a radioactive substance decays is ...

Members