8. 8. Let's say a substance has a half-life of eight days. If there are 40 grams present now, how much is left after three days?

Q: A number of a specific bacteria grows at a rate of 2% per hour. Estimate the number of the bacteria…

A:

Q: 3. When a person takes a drug, one can measure the number of milligrams of the drug in a person's…

A: Need to write down the value of A, the value of B, etc.

Q: Q7. A 150 grams of a radioactive gas is accumulated in a container. After 3 months, only 141 grams…

A:

Q: 3. E. Coli bacteria decreases by 6% every hour. You begin with 155 E Coli. Which of the following is…

A:

Q: 50. On average, 40 jobs arrive per day at a factory. Thetime between arrivals of jobs is…

A: Given:

Q: 1. A radioactive material has a half-life of 200 years. my centuries are needed to dissipate its…

A: We know formula for the half life of a radioactive material is  Nt=N012tt1/2 Where N(t) is the…

Q: 12. A 4000 mg sample of bismuth decays to 500 mg in 18 minutes. What is its half-life?

A:

Q: The half-life of Carbon-13 is 5750 years. Samples taken at an excavation site show that a one…

A:

Q: carbon-14? The decay​ rate, k, of​ carbon-14 is

A: The general exponential function of decaying is given as: A=A0e-kt where A is present amount Aο is…

Q: 9. If 75 mg of a radioactive substance decays to 15 mg in 20 years, find the Half-Life, in minutes,…

A:

Q: Suppose that 10 grams of the 1 plutonium isotope Pu239 was released in the .Chernobyl nuclear…

A:

Q: If Sandago has a present population of 70,000 and the population is increasing by 3% each year. 1.…

A: The function that models the population at time t is given by, Pt=P0ert, where P0 is the initial…

Q: Suppose you have a 1024 mg sample of a substance known to have a half-life of 50 years. Find the…

A: Given half-life of sample=50 yrs and the initial sample is = 1024mg.

Q: 10. A newspaper is losing subscribers. In 2010, the newspaper had 30,000 subscribers. The newspaper…

A:

Q: 10. You have 20 grams of phosphorus that decays 5% per day. How long does it take for it to be 10 g?

A:

Q: 4. How old is a hominid skull with 30% of its original C14 concentration, given that the half-life…

A: Not required.

Q: 8. The half-life of a particular radioactive substance is 8 hours. Suppose a chemist has a sample…

A: Given query is to find the modal for the radio active decay.

Q: 2. Suppose that a bacteria population is dying off at a rate of 30% per day. How much of the…

A:

Q: With a half life of 36 hours. Suppose a patient receives a  medication of 90 milligrams at midnight.…

A: A=A0e-ktAt t=36,A=A02A02=A0e-36kk=ln236A=A0e-ln236tA0=90At noon on first day…

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: 3. A dosage of 525 milligrams of acetaminophen is administered, and its half-life in the bloodstream…

A: Given that the initial amount is = 525 mg Half life= 3 hours=180 minutes Let us denote Q= the amount…

Q: 1. The half-life of a radioactive material is 41.44 minutes. Starting with 840.7 grams of the…

A:

Q: 2. The half-life of a radioactive material is 22.52 hours. If you measure 88.95 grams of the sample…

A: Half-life is the time required for a quantity to reduce to half of its initial value. The term is…

Q: 9. a. The half-life of 210Po is 138.4 yr. If 0.5 mg of 210Po is present in a sample what is the half…

A: