A certain radioactive material B follows the law of exponential change and has a half-life of 100 hours. Find how long it takes for 80% of the radioactivity to be dissipated. a. t 222. 45 hours b. t 233. 45 hours C. t= 232. 45 hours d. et= 223.45 hours
A certain radioactive material B follows the law of exponential change and has a half-life of 100 hours. Find how long it takes for 80% of the radioactivity to be dissipated. a. t 222. 45 hours b. t 233. 45 hours C. t= 232. 45 hours d. et= 223.45 hours
Chapter5: Exponential And Logarithmic Functions
Section: Chapter Questions
Problem 28T: The half-life of radioactive actinium ( 227AC ) is 21.77 years. What percent of a present amount of...
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