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Please answer the following questions using exponential and logarithmic models.

4) A wooden artifact from an archaeological dig contains 70 percent of the Carbon-14 that is present in living trees. To the nearest year, about how many years old is the artifact? (The half-life of Carbon-14 is 5730 years.) In years

5) A tumor is injected with 0.5 grams of Iodine-125, which has a decay rate of 1.15% per day. Write an exponential model representing the amount of Iodine-125 remaining in the tumor after t days. Then use the formula to find the amount of Iodine-125 that would remain in the tumor after 60 day

6) A doctor prescribes 100 milligrams of a therapeutic drug that decays by about 20% each hour. To the nearest hour, what is the half-life of the drug?

7) A tumor is injected with 0.4 grams of Iodine-125, which has a decay rate of 1.15% per day. To the nearest day, how long will it take for half of the Iodine-125 to decay? How many Days?

8) A tumor is injected with 0.4 grams of Iodine-125, which has a decay rate of 1.15% per day. Write an exponential model representing the number of grams *f* of Iodine-125 remaining in the tumor after *t* days.

f(t)=?

Then use the formula to find the amount of Iodine-125 that would remain in the tumor after 30 days. (Round your answer to four decimal places.) In grams

9) The half-life of Erbium-171 is 7.5 hours. What is the hourly decay rate? Express the result to four decimal places.

Express the hourly decay rate as a percentage to two decimal places. In percent %

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Please help Consider two identical batteries. Each have identical emf and identical internal resistance consider a...

please help Consider two identical batteries. Each have identical emf and identical internal resistance consider a load resistor of resistance R. a) Draw a series circuit of the two batteries connected with the negative terminal of battery connected to the negative terminal of battery 2 and the load...

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6 24 2 8. Then use the following information to show the impact of a change...

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Case study: An 83-year-old severely ill man was admitted to a hospital with symptoms of diarrhea...

Case study: An 83-year-old severely ill man was admitted to a hospital with symptoms of diarrhea and vomiting. The patient decided to go to the emergency room when he started to notice blood in his bowel movements. His food history includes consuming unpasteurized milk from a local farm. What was th...

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A repair bill for your car is $553, and the parts cost $265. The labor cost is $48 per hour. How do you write and solve and equation to find the number of hours of labor spent repairing the car?

A repair bill for your car is $553, and the parts cost $265. The labor cost is $48 per hour. How do you write and solve and equation to find the number of hours of labor spent repairing the car?...

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What are three numbers between 0.33 and 0.34?

What are three numbers between 0.33 and 0.34?...

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Accounting 285 Team Exercise 3 (Koy) (Chapters 5-6) Chapter 5 Problem 1 Smores Co. produces and...

Accounting 285 Team Exercise 3 (Koy) (Chapters 5-6) Chapter 5 Problem 1 Smores Co. produces and sells many camping products. The company has just opened a new plom to produce a cushy sleeping bag that will be marketed throughout the United States. The following cost and revenue data relate to May, t...

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Need help with number 7! Questions 4-10 refer to the following values, which represent the survival times, in days, of 18 guinea pigs who were exposed to the infectious bacteria that causes tuberculosis: 100 104 108 118 138 329 403 4. Construct a dotplot representing this dataset. Make sure your ...

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A newborn infant died after receiving penicillin G benzathine IV. An order for penicillin G benzathine...

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Por questions 14 - 16 assume the company uses Weighted Average cost inventory valuation, = 198.65o...

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1. Let X and Y be two jointly continuous random variables with joint CDF otherwsie a....

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#4 Problem 1 Find the general solution for the given differential equation Problem 2 Solve the d.e. y(4)2y(3) +2y() 3et +2te- +e-sint. Problem 3 Determine the second, third and fourth derivative o...

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1.) Capital budgeting is concerned with: a.) managing a firm's cash budgeting procedures b.) whether a...

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13. A 0.200-kg aluminum plate, initially at 20°C, slides down a 13.0-m-lon to the horizontal. The...

13. A 0.200-kg aluminum plate, initially at 20°C, slides down a 13.0-m-lon to the horizontal. The force of kinetic friction exactly balances the component of gravity down the plane so that the plate once started, glides down at constant velocity. If 90% of the mechanical energy of the system is ...