Asked by Andrew

When installed in the year 1,985, a cobalt-60 radiation therapy source (k = 0.131 yr-1) produced a beam capable of delivering 323 rem per minute (a unit to describe the beam intensity). What is the beam intensity (in rem/min) in the year 2007?

Answers

Answered by DrBob222
ln(Io/I) = kt
solve for I.
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