50 mg of radioactive substance decays by 20% in 10 years a. what is the value of k in the formula y=ae^kt where y is the amount of radioactive substance? b. what is the value of b in the formula y = ab^t where y is the amount of the radioactive substance at t years? c. how long will it take until there is 20% remaining?

Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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50 mg of radioactive substance decays by 20% in 10 years

a. what is the value of k in the formula y=ae^kt where y is the amount of radioactive substance?

b. what is the value of b in the formula y = ab^t where y is the amount of the radioactive substance at t years?

c. how long will it take until there is 20% remaining?

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