15. Radium decomposes at a rate proportional to the amount present. If half of the origi amount disappears after 1000 years, what is the (approximate) percentage lost in years? (а) 6.70% (b) 4.50% (c) 5.36% (d) 4.30%

Intermediate Algebra
10th Edition
ISBN:9781285195728
Author:Jerome E. Kaufmann, Karen L. Schwitters
Publisher:Jerome E. Kaufmann, Karen L. Schwitters
Chapter11: Exponential And Logarithmic Functions
Section11.2: Applications Of Exponential Functions
Problem 29PS: What rate of interest to the nearest hundredth of percent is needed so that an investment of 2500...
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15. Radium decomposes at a rate proportional to the amount present. If half of the original
amount disappears after 1000 years, what is the (approximate) percentage lost in 100
years?
(a) 6.70%
(b) 4.50%
(c) 5.36%
(а) 4.30%
Transcribed Image Text:15. Radium decomposes at a rate proportional to the amount present. If half of the original amount disappears after 1000 years, what is the (approximate) percentage lost in 100 years? (a) 6.70% (b) 4.50% (c) 5.36% (а) 4.30%
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