The half-life of cesium-137 is 30 years. Suppose we have a mg sample.

  1. Find the mass that remains after t years.

    y(t) = mg

  2. How much of the sample remains after years? (Round your answer to two decimal places.)

    y() = mg

  3. After how long will only 1 mg remain? (Round your answer to one decimal place.)

    t = years