The half-life for thorium-227 is 18.72 days. The amount A (in grams) of thorium-227 after t days for a 10- gram sample is given by A(t) = 10 0.5 18.72 How long will it take before 5 grams of thorium-227 is left in the sample? Round your answer to the hundredths place.

Q: Radioactive Carbon-14 The percentage Pof radioactive carbon- 14 remaining in a fossil after t years…

A: Note: As P and b for the first question are not given in the data provided by you. Solved the second…

Q: 8/x=28.2//57.6

A: We have to find x

Q: A fossil contains 2.06 grams of carbon 14. Refer to the formula A(t) =  C/ 0.999879t, which gives…

A: Given: A fossil contains 2.06 grams of carbon 14. The formula A(t)=C0.999879t gives the original…

Q: antity of U-232 remains after 30 yea

A: The quantity remains after 30 years is 75%. It is given that AA0=0.75 , t=30 years. The equation…

Q: A juice box measures 4 1/ 1/5 5 cm long, 10 cm high, and 5 % cm wide. What is the total amount of…

A:

Q: Approximate the solution to ln 4x = 3.2. Round to 3 decimal places

A:

Q: In 2012, the price of 1lb baking potato was $0.9. Use annual inlation rate of 6% to calculate the…

A: In 2012, the price of 1 lb baking potato was , P =  $0.9.  inflation rate , r  = 6%  t = 9 years…

Q: b. Water that is initially contaminated with a concentration of 9 milligrams of pollutant per liter…

A: Given pollutant per liter of water t hours after the purification process begins is C(t)=934t/2

Q: A radioactive substance has a decay rate of 0.079 per minute. How many grams of a 200 gram sample…

A: The radio active decay is governed using the equation: N=N0e-kt. Here, N0 is the initial population,…

Q: A wooden artifact from an ancient tomb contains 65% of the carbon-14 that is present in living…

A: the radioactive decay equation is  given by m=m0e-ln2t't where t' is the half life. the tomb…

Q: 3. Describe which way (up/down, left/right) and by how much the graph of f(x) = log z will shift…

A: Given; f(x)=log x