Radium-223 has a half-life of 11.4 days. Find the decay rate a. Starting with a sample of 100 kg, how long will it take until only 20 kg are left?

PREALGEBRA
15th Edition
ISBN:9781938168994
Author:OpenStax
Publisher:OpenStax
Chapter11: Graphs
Section11.1: Use The Rectangular Coordinate System
Problem 11.28TI: Find three solutions to the equation: x + 5y = 10.
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7. Radium-223 has a half-life of 11.4 days. Find the decay rate a. Starting with a sample
of 100 kg, how long will it take until only 20 kg are left?
Transcribed Image Text:7. Radium-223 has a half-life of 11.4 days. Find the decay rate a. Starting with a sample of 100 kg, how long will it take until only 20 kg are left?
ay
In Problems 3 through 8, you can use the solution formula for
dt
y(t) = y(0)eat + eat
f²e-as
0
e-asq(s) ds.
=
ay+q(t):
Transcribed Image Text:ay In Problems 3 through 8, you can use the solution formula for dt y(t) = y(0)eat + eat f²e-as 0 e-asq(s) ds. = ay+q(t):
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