A scientist begins with 20 grams of a radioactive substance. After 7 days, the sample has decayed to 17 grams. Find the half-life of this substance.

Q: At a certain instant, 100 grams of a radioactive substance is present. After 20 years, 99.76 grams…

A: given that 100 gm of a radio active substance is present. after 20 years 99.76 gm remain. we have to…

Q: scientist finds that an intial bacteria count was 45 million and 5 hours later, the count was up to…

A: Please refer to the image below

Q: A mother is now 4 times as old as her daughter. In 4 years, the mother will be six times as old as…

A:

Q: The school population for a certain school is predicted to increase by 40 students per year for the…

A: To find  Enrollment of students after 8 years

Q: A population of mice doubles every 6 months. If it started with 4 mice, how many will there be after…

A:

Q: A bacteria population doubles every four minutes. If the population begins with two cells, how long…

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Q: Suppose that some graduate students left 8 grams of a radioactive substance unattended in their…

A: Consider the quantity of a radioactive substance initially present be N0. If the half-life of this…

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

A:

Q: The half life of a radioactive substance is 25 years, if you  start  with some amount of this…

A:

Q: The population of a city is 130​,000. If the population is declining continuously by 3.2​% per​…

A:

Q: town has a population of 15,000 and grows at 7% every year. What will be the population after 10…

A: Explanation of the answer is as follows

Q: family has a phone plan that includes 6 GB of data per month. 15 days into a 30-day month, the…

A: Given: 15 days into a 30-day month, the family has used 2 GB. To find: At that rate, how many GB…

Q: A lab currently has 70 mg of radioactive material that decays at 3.5% per year. Federal regulation…

A:

Q: The number of cells in a tumor doubles every 4.5 months. If the tumor begins with a single​ cell,…

A:

Q: If 250mg of a radioactive element decays to 190mg in 12 hours, find the half-life of the…

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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 population of deer contains 10 000 individuals. During a year, 5000 individuals are born and 4500…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: Find the half-life of an element which decays by 3.42% each day.

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Q: If 10% of a radioactive substance decays after 33 years. How much will remain after 200 years?

A: Let in starting the radioactive substance = No And after t time it becomes N

Q: town has a population of 14000 and grows at 3% every year. What will be the population after 6…

A: Population grows 3% every year    N0=14000    Formula used. N0    = Present Value of population r…

Q: The population of a city doubles every 15 years. At this rate, how long will it take the population…

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Q: The half-life of carbon-14 is 5600 years. If a piece of charcoal made from the wood of a tree shows…

A: Given: The half-life of carbon-14 is 5600 years. If a piece of charcoal is made from the wood of a…

Q: After the release of radioactive material into the atmosphere from a nuclear power plant in a…

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Q: The bacteria in a petri dish grow in a manner such that each day the number of bacteria doubles. On…

A: Hey, since there are multiple questions posted, we will answer the first question. If you want any…

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

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Q: A bacteria has an initial population of 200. If after 2hrs, its population is 10 times the original…

A:

Q: The​ half-life of a radioactive substance is 25 years. If you start with some amount of this​…

A:

Q: 6. Martin is currently four times as old as his brother Luther. After 10 years, he will be twice the…

A:

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: The radioactive element carbon-14 has a half-life of 5750 years. A scientist determined that a…

A: The half life is 5750 years. Amount of carbon-14 lost is 28%.

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

A: Given Half life of a radioactive substance is 20 years

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

A:

Q: How much of a 102-mg sample would be remaining after 7 years? b) If the half-life were shorter than…

A: In this question, we use the application of differential equation to calculate the amount of lead…

Q: half life of a decaying substance is the amount of time it takes for the substance to reduced to…

A: Given query is to find the the time taken to reduced the substance to 10 mg.

Q: If 10% of a radioactive substance decays after 33 years how much will remain after 200 years?

A:

Q: doctor prescribes 100 milligrams of a therapeutic drug that decays by about 20% each hour (ie. after…

A: To determine the half-life of the drug.

Q: A doctor prescribes 275 mg of a drug. The amount of the drug in the patients body decays by 35%…

A: Half life of a drug means that the time that drug takes to reduce its amount in the body by half. At…

Q: Global warming is causing the temperatures around the world to rise. If the average temperature of…

A: The exponential growth can be modelled using the equation f(t)=a1+rt. Here, r is the rate of growth…

Q: If the population of a small city is 55,000. If the population grows continuously by 5​% per​ year,…

A:

Q: The half-life of carbon-14 is 5600 years. If a piece of charcoal made from the wood of a tree shows…

A:

Q: The​ half-life of a radioactive substance is 25 years. If you start with some amount of this​…

A: Given: Half life of a radioactive substance is 25 years. Concept used: Here we shall use the formula…

Q: A new car is purchased for $40,000 and over time its value depreciates by one half every 3 years.…

A:

Q: The school population for a certain school is predicted to increase by 40 students per year for the…

A: It is given that, the school population for a certain school is predicted to increase by 40 students…

Q: A person with a normal body temperature of 36 °C dies in an accident while traveling by car. The…

A: A person with a normal body temperature of 36 °C dies in an accident while traveling by car. The…

Q: there were 60 grams of carbon-14 initially, how many grams would be remaining after 12 half-lives?

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Q: A radioactive substance has a half-life of 25 years. If 640 grams of the substance are present…

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Q: A 50-mg sample of a radioactive substance decays to 34 mg after 30 days. How long will it take for…

A: The radioactive decay is modelled using the equation: N(t)=N0e-kt, where N0 is the initial amount…

Q: e number of years required for a $2000 investment to double at a 10% interest rate coumpounded…

A:

Q: The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be…

A:

Q: If a radioactive element has a​ half-life of ​4 hours, then x grams of the element dwindles to x/2…

A: If a radioactive element has a​ half-life of ​4 hours, then x grams of the element dwindles to x/2…

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.