Growth and Decay Applications.notebook
Growth and Decay Applications
March 05, 2015
Radium has a half­life of 1660 years. If the initial amount of radium is 200 grams, how much will remain in 500 years?
f(t) represents the amount of the substance or population
present at any time "t".
C represents the initial amount of the substance or population
present at time "t=0".
k represents the rate at which the substance or population is
growing or decaying.
Mar 5­7:03 AM
Cm242 has a half­life of 163 days. How much remains of 10 grams after one week?
Mar 5­7:10 AM
The decay constant of Strontium­90 is –.0248. What amount of 250 mg of strontium­90 is present after 5 years?
Mar 5­7:18 AM
Mar 5­7:17 AM
How much of a 100 gram specimen of Na22 remains after 7 years if its half­life is 2.6 years?
Mar 5­7:12 AM
The decay constant for cobalt 60 is k = –.13 when time is measured in years. Find the half­life of cobalt 60.
Mar 5­7:24 AM
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Growth and Decay Applications.notebook
The half­life of carbon 14 is approximately 5590 years. Find the decay constant of carbon 14.
March 05, 2015
An artifact was discovered at the Desert site in Nova Scotia. Tests showed that 28% of the original carbon 14 was still present. What is the probable age of the artifact?
Some bone artifacts were found at the Lindenmeier site in Northeastern Colorado and tested for their carbon 14 content. If 25% of the original carbon 14 was still present, what is the probable age of the artifacts?
Mar 5­7:24 AM
Aurora, Colorado, would double in size every 8 years if the population continued to grow it its 1970 ­ 1975 rate. Estimate its 1985 population if the population was 74,974 in 1970.
Mar 5­7:28 AM
Mar 5­7:28 AM
Springfield, Missouri, had a population of 95,865 in 1960, and grew from 1960 to 1980 at a rate that would cause it to double every 42.23 years. Estimate Springfield's population in 1990
Mar 5­7:29 AM
Mar 5­7:39 AM
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