An archaeological sample contains 0.622 g of lead-206 and 2.198 g of uranium-238. Assume that all the lead now present in the rock came from the radioactive decay of theuranium and that no appreciable amounts of other radioactive nuclides are present in the sample. The decay rate constant for the uranium is 1.54 x 10-10of the sample?year. What is the ageO a.9.1 x 109 yearsO b.77.98 x 108 yearsOC 1.84 × 109 yearsO d. 7.26 x 109 yearsO e. none of these

Given that :- Mass of Lead=0.622g and Mass of Uranium=2.198g Decay rate for uraniumλ=1.54×10-10/year…

Answered: An archaeological sample contains 0.622…

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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A certain radioactive material is known to decay at a rate proportional to the amount present. If initially there 150 mg. of the materials present and after 2 years it is observed that 10% of the original mass has decayed. What is the time necessary for the 25% of the original mass to have decayed? O 15 years O 22 years O 28 years O 5 years
Radium decomposes at a rate proportional to the amount present. If 200 mg. of radium id reduced to 160 mg. radium in 250 years, determine how much radium will remain at the end of 500 years. 200 200 * O 200 * 160 200 160 O 160 * 2002 160 200 * (200
Exercise 2.1.6 A body is found at a certain time and has a temperature of 92.6 degrees Fahren- heit in an environment with ambient temperature 70 degrees. Two hours later the body has a temperature of 90 degrees Fahrenheit. The flu was going around and it was believed the victim was on her way to the drugstore because her roommate said she had a temperature of 102.4 degrees Fahrenheit. If Newton's law of cooling holds, estimate when the person died, relative to the time the body was found. Hint: call the time the body is found t = 0 and solve u' (t) = -k(u(t) -A) with A = 70 and initial condition u(0) = 92.6. Then use u(2) = 90 to find k, and from that figure out at what time u(t) equaled 102.4.
A certain radioactive material is known to decay at a rate proportional to the amount present. If after one hour it is observed that 10% has decayed, find the half-life of the material (i.e. How long will it take for 50% of the material to decay?)
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lodine-131, with a half-life of 8.04 days, is used in the treatment of thyroid disorders. Assuming that none of the material is excreted from the body, what percentage of iodine-131 still will be present in the body one week after ingesting a small amount of material? 53.7% 54.7% 55.7% 56.7% What percentage of iodine-131 still will be present in the body 30 days after ingesting a small amount of material? 7.5% 8.0% 8.5% 9.0%
I repost this question and request for the sub parts (d,e,f and g) to be solved.
Qn4. Given a life table 1 4 5 6 1,000 975 850 725 300 250 Evaluate ) 1/21 (i) 43

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