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Type: Multiple-Choice
Category: Exponents
Level: Grade 11
Standards: HSF-BF.B.5, HSF-LE.A.4
Author: nsharp1
Last Modified: 4 years ago

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Grade 11 Exponents CCSS: HSF-BF.B.5, HSF-LE.A.4

There is a 100 gram sample of a radioactive substance. After 1 hour, only 63 grams of the sample is left. What is the approximate value of the decay constant, k, if the equation used to determine the decay of this substance is N=N0ekt?
  1. -0.46
  2. 0.46
  3. 0.04
  4. 0.07