1. An earthquake in Mathville measured 7.5 on the Richter scale. Determine the magnitude of an earthquake in Polytown th
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1. An earthquake in Mathville measured 7.5 on the Richter scale. Determine the magnitude of an earthquake in Polytown th
1. An earthquake in Mathville measured 7.5 on the Richter scale. Determine the magnitude of an earthquake in Polytown that is 5 times as intense as Mathville's earthquake. 2. An 80 g sample of an unknown radioactive substance decays to 56 g after approximately 3 hours. Determine the half-life of the unknown substance.
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