Radium decomposes at a rate proportional to the amount present. If half of the original amount disappears after 1000 years, what is the percentage lost in 100 years?

Q: If half a certain amount of radium decays in 1600 years. What percentage of the original amount will…

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Q: Total reserves for a non renewable resource at 250 million tones.annual  consumption, currently at…

A: We have total non renewable resources=250 million tonesfirst year consumption is 20 millionsecond…

Q: The half-life of radium in a piece of lead is 1600 years. What percentage of the original amount of…

A: Given that, the half-life of radium in a piece of lead is 1600 years. Note that, the formula for…

Q: a city grows at a rate directly proportional to its population. The initial pop. is 30 and it…

A: The rate of change of the variable (Population here) is proportion to the variable itself. Hence,…

Q: If a piece of machinery depreciates continuously at an annual rate of 4%, how many years will it…

A: To find: The number of years it will take for the value of machinery to halve. Concept used: The…

Q: Radioactive radium has a half-life of 1899 years. If 20g of the substance are present initially,…

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Q: Radium decomposes at a rate proportional to the amount present. If 100 milligrams of Radium at…

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Q: The growth rate of a colony of rabbits is 40% per month. If the initial population of the colony 100…

A: The initial population of the rabbits is 100. It is given that the growth rate of rabbits is 40% per…

Q: A toxic radioactive substance in the amount of 7 miligrams per square centimeters is detected in the…

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Q: Radioactive radium has a half-life of approximately 1599 years. What percent of a given amount…

A: A(t)=A012thh is the half lifeA(t) is the amount after t years.A0 is the initial value.

Q: The population of an endangered species decreases at a rate of 7% per year. Approximately how long…

A: Answer

Q: A current state has a population of 3500. With the rate of 0.23/year, what will be the population…

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Q: Radium decomposes at a rate proportional to the amount present. In 100 yrs, 100 mg of radium…

A: Initial radium quantity Ni = 100 mg after t = 100 years N = 96 mg

Q: A radioactive substance has a half-life of 47 years. To two decimal places, how many years does it…

A: Given : A radioactive substance has a half-life of  years. To find the time taken for the quantity…

Q: an epidemic starts when 4 people are infected with deadly virus. If the population of infected…

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Q: How much of a radioactive kind of tungsten will be left after 363 days if the half-life is 121 days…

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