The exponential function N = 500 × 0.74t, where t is measured in years, shows the amount, in grams, of a certain radioactive substance present. (a) Calculate N(4). (Round your answer to one decimal place.) Explain what your answer means. After *blank years there are *blank grams of the radioactive substance present. (b) What is the yearly percentage decay rate? (Round your answer to one decimal place.)
The exponential function N = 500 × 0.74t, where t is measured in years, shows the amount, in grams, of a certain radioactive substance present. (a) Calculate N(4). (Round your answer to one decimal place.) Explain what your answer means. After *blank years there are *blank grams of the radioactive substance present. (b) What is the yearly percentage decay rate? (Round your answer to one decimal place.)
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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The exponential function N = 500 × 0.74t, where t is measured in years, shows the amount, in grams, of a certain radioactive substance present.
(a) Calculate N(4). (Round your answer to one decimal place.)
Explain what your answer means.
After *blank years there are *blank grams of the radioactive substance present.
(b) What is the yearly percentage decay rate? (Round your answer to one decimal place.)
(c) What is the monthly decay factor rounded to three decimal places?
What is the monthly percentage decay rate? (Round your answer to one decimal place.)
(d) What is the percentage decay rate per second? (Note: For this calculation, you will need to use all the decimal places that your calculator can show. Round your answer to eight decimal places.)
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