Let Q represent a mass of radioactive plutonium (239Pu) (in grams), whose half-life is 24,100 years. The quantity of plutonium present after t years is Q = 15(1/2)t/24,100 . (a) Determine the initial quantity (when t = 0). g
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
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Let Q represent a mass of radioactive plutonium (239Pu) (in grams), whose half-life is 24,100 years. The quantity of plutonium present after t years is
g
(b) Determine the quantity present after 85,000 years. (Round your answer to two decimal places.)
g
(c) Use a graphing utility to graph the function over the interval t = 0 to t = 150,000.
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