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Type: Multiple-Choice
Category: Exponents
Level: Grade 11
Standards: HSF-LE.A.4
Tags: HSF-LE.A.4
Author: HTPhysics
Created: 3 weeks ago

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Grade 11 Exponents CCSS: HSF-LE.A.4

The amount of a radioactive substance halves every 140 years. If a sample currently has a mass of 60 grams, how long will it take for the mass to decay to 5 grams?
  1. 392 years
  2. 435 years
  3. 502 years
  4. 562 years
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