The halflife of Radium-226 is 1590 years. If a sample contains 500 mg, how many mg will remain after 3000 years ?

Q: how long does it take an account containing $8000 to be worth $15000 if the money is invested at 9%…

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Q: Assume an average human heart beats 65 times per minute and an average human lifetime is 80 years.…

A: Known Facts:

Q: If there were originally 500 grams of carbon-14 originally, how much carbon-14 would remain after 10…

A: In each half life , amount becomes half of the previous one. It means that, after each half life the…

Q: The number of bacteria doubles each day. How many bacteria will a sample have after 13 days if it…

A: We have to find how many bacteria will a sample have after 13 days if it starts with 40 bacteria.

Q: The half-life of the radioactive element unobtanium-29 is 20 seconds. If 80 grams of unobtanium-29…

A:

Q: The half-life of radium is 1690 years. If 40 grams are present now, how much will be present in 690…

A: Given: The half-life of radium is 1690 years. if 40grams are present now.

Q: In 450 years, a sculpture will be twice as old as it was 250 years ago. What is the present age of…

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Q: The half-life of a drug in the bloodstream is 18 hours. if a 1000 mg dose is prescribed, what amount…

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Q: The half life of a radioactive substance is 20 years. If you start with some amount of this…

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Q: The current population of a threatened animal species is 1.7 million, but it is declining with a…

A: Given:  The current population of a threatened animal species is 1.7 million, but it is declining…

Q: A pewter bowl is 8 years old, and a silver bowl is 22 years old. In how many years will the silver…

A: Let after x years the silver bowl will be twice the age of the pewter bowl. After x years the age of…

Q: between 2007 and 2008, country B grew almost 2.5% to a populatiopn of 147,000 people. if this geowth…

A: between 2007 and 2008, country B grew almost 2.5% to a populatiopn of 147,000 people. if this geowth…

Q: The half-life of radioactive cobalt is 5.27 years. If 100 grams of radioactive cobalt is present…

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Q: The half-life of the radioactive element krypton-91 is 10 seconds. If 16 grams of krypton-91 are…

A: Given: The half-life of the radioactive element krypton-91 is 10 seconds.

Q: The half-life of carbon-14 is known to be 5720 years. Doctor Frankenstein has 300 grams of…

A: From the given data:

Q: A particular car is said to depreciate 15% each year. If the car new was valued at $20,000, what…

A:

Q: Lead-210 has a half-life of 22.3 years. How much of a 102-mg sample would be remaining after 6 years

A: To solve such problem we use the following two equations K=0.693t12 N=N0e−Kt Given that T12=22.3…

Q: An car depreciates (decreases in value) by 20% of its value from the previous year. If the car was…

A: Price of the car is decreases by 20% for every year. Therefore r=20% Price of car is $40,000…

Q: The radioactive element Carbon-14 has a half-life of approximately 5730 years. A fossil is a measure…

A:

Q: The half-life of the radioactive element unobtanium-31 is 5 seconds. If 176 grams of unobtanium-31…

A: To explain the given problem

Q: According to statistics, a person will devote 34 years to sleeping and watching TV. The number of…

A: Given,  A person will devote 34 years to sleeping and watching TV.  The number of years sleeping…

Q: A squirrel starts the winter with a full supply of food stored. If, cach week, the squirrel eats 12%…

A: A squirrel starts the winter with a full supply of food stored.every week, the squirrel eats 12% of…

Q: The half-life of Radium-226 is 1590 years. If a sample contains 300 mg, how many mg will remain…

A: We know the half life formula:Nt=N012tt1/2Where Nt=Amount after t years.          N0=Initial Amount.…

Q: The population of a country doubles in 50 yrs. How many years will it be 7 times as much?

A: The population of country becomes double in 50 years.

Q: The half-life of radioactive potassium is 1.3 billion years. If 10 grams is present now, how much…

A:

Q: Polonium -210 is a radioactive substance with a halflife of 138 days. if a nuclear facility is…

A: Given: Half life of polonium 210  = 138 days Initial quantity = 245 gms

Q: The half-life of Radium-226 is 1590 years. If a sample contains 200 mg, how many mg will remain…

A:

Q: If 525 mg of a radioactive element decays to 450 mg in 48 hours, what is its half-life?

A: we are using model for radioactive decayN=N0e-λtwhereN0=initial amountN=The amount test of a…

Q: The half life of a drug in the bloodstream is 9 hours. What fraction of the original drug dose…

A: After 9 hours, half is left After a SECOND 9 hours (18 total), half of a half, or, one quarter is…

Q: There are 6,000 cases of Coronavirus in Hong Kong. If Coronavirus cases increase at a rate of 3% per…

A: according to question number of Coronavirus cases after n days is=6000(1+3100)n =6000(1.03)n

Q: Suppose that a piano costs $5,000 and loses 20% of its value each year. What will be the value of…

A: This question is about application of profit and loss of a product

Q: a radioactive isotope, selenium, used in the creation of medical images of the pancreas, has a…

A: To use the exponential model of radioactivity to determine the required amount of substance

Q: the amount of a given radioactive substance today is 8 grams. After 10 years, the amount remaining…

A:

Q: What is Farah's age twenty years from now if she was x years old 10 years ago?

A: Given thatFarah's age is  x years before 10 years agoTo find Farah's age after 20 years.

Q: The half-life of a medication prescribed by a doctor is 6 hours. How many mg of this medication is…

A: The medicine is decaying exponentially. Use the half-life formula to calculate the medicine left…

Q: Light travels at a rate of 186,000 miles per second. If our moon is 238,860 miles from Earth, how…

A: We know, Speed = DistanceTime ⇒ Time = DistanceSpeed

Q: Andrea is 3 times as old as Pauline, 10 years from now Andrea will be twice as old as Pauline, How…

A: Let the present age of Pauline be x. Andrea is 3 times as old as Pauline. Therefore the age of…

Q: A town has a population of 12000 and grows at 4% every year. To the nearest year, how long will it…

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Q: Sally is 3 times as old as John. 8 years from now, Sally will be twice as old as John. How old is…

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Q: The current population of a threatened animal species is 1.7million, but it is declining with a​…

A:

Q: The half life of radium is 1690years. If 59 grams are present now, how much will be present in 60…

A: Let A(t) be the amount remaining in t years, then

Q: If 50 grams of a radioactive substance decomposed to 42 grams in 2 years, then, to the nearest gram…

A:

Q: The half-life of Radium-226 is 1590 years. If a sample contains 200 mg, how many mg will remain…

A:

Q: If the population of the country doubles in 50 years, how many years it would triple?

A:

Q: The half-life of Sodium-24 is 14.96 hours. If a sample contains 490 mg, how many mg will remain…

A:

Q: The half-life of Cobalt-56 is 77.27 days. If a sample contains 460 mg, how many mg will remain after…

A: Half-lifeA=Ao. 12n whereA- The mass of the substance that remains Ao- Initial massn= ratio between…

Q: A town has a population of 12000 and grows at 4% every year. To the nearest year, how long will it…

A:

Q: After 25 years, 60% of a radioactive substance still remains in a 20 gram sample. What is the…

A: Half life of a radio active material is the time required to reduce the initial quantity to its…

Q: According to statistics, a person will devote 31 years to sleeping and watching TV. The number of…

A: To find: The number of years will the person spend on each of these activities. Given information: A…

Q: The population of the Philippines doubled from 1967 to 1997. Assuming the rate of population…

A: Let 'x' be the population of Philippines in 1967. Therefore, in 1997 the population become '2x'   We…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.