antity of U-232 remains after 30 yea

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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75% of a quantity of U-232 remains after 30 years. What is the half life?

200 YEALS
6.7590 OFA QUANTITY OFU-232 REMAIUS AFTER
30 YEARS. WHAT IS THE HALF UFÆ?
つ-x-8x-S
Transcribed Image Text:200 YEALS 6.7590 OFA QUANTITY OFU-232 REMAIUS AFTER 30 YEARS. WHAT IS THE HALF UFÆ? つ-x-8x-S
Expert Solution
Step 1

The quantity remains after 30 years is 75%.

It is given that AA0=0.75t=30 years.

The equation represents 

AA0=e-λt0.75=e-λ×30ln0.75=-30λlneλ=ln0.75-30=9.6×10-3

 

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