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At : a.m. a radioactive material weighed grams, but at : p.m. it only weighed grams.

  1. Write an equation to model this situation.

    You will need to write an equation of the form . Substitute the given information
    into the general equation and solve for the desired values.

  2. What are the approximate hourly multiplier and the hourly percent of decrease?

    or a decrease

  3. What was the weight of the material at a.m.?