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April 18, 2014

Homework Help: math30

Posted by alejandro on Tuesday, July 3, 2012 at 4:16am.

The mass of a radioactive sample is represented in the graph below. The initial mass of 32 mg decays to 8 mg after 21 hours.

1)What is the half-life of the radioactive sample, in minutes?

2)Solve each equation.
a. 4 8x-1 = 8

b. 3^(2x-5) = 1/27x

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