6) A certain radioactive element has a decay rate of 7 % per day, that is it satisfies the equation: dA = -.07A dt a) Find a function that satisfies the equation if the amount of the element present at t=0 is 800 g. (5) b) How much will be present after 20 days? (2) c) What is its half-life? (3) 105

College Algebra
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ISBN:9781337282291
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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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6) A certain radioactive element has a decay rate of 7 % per day, that is it satisfies the equation:
dA
= -.07A
dt
a) Find a function that satisfies the equation if the amount of the element present at t=0 is
800 g. (5)
b) How much will be present after 20 days? (2)
Transcribed Image Text:6) A certain radioactive element has a decay rate of 7 % per day, that is it satisfies the equation: dA = -.07A dt a) Find a function that satisfies the equation if the amount of the element present at t=0 is 800 g. (5) b) How much will be present after 20 days? (2)
c) What is its half-life? (3)
105
Transcribed Image Text:c) What is its half-life? (3) 105
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