Determine the half-life of radioactive element
The unknown radioactive element decays in non-radioactive substances. In 760 days radioactivity of the sample decreases by 62 percent.
i) Determine the half-life of element?
ii) How long it will take for the sample of 100mg to decay to 96 mg?
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Employ the given degree of confidence and sample data to construct a confidence interval for the population mean? Assume that the population has a normal distribution.
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If you own 300 shares of Alaska Air at $42.88, 350 shares of Best Buy at $51.32, and 250 shares of Ford Motor at $8.51, find portfolio weights of every stock?
A lot of 200 items is inspected by drawing the sample of size n without replacement. The lot is accepted only if all the items in sample are good. What is the required sample size to make sure that lots containing 2% unacceptable items would be re
The tank has 1740 L of pure water. The solution which has 0.07 kg of sugar per liter enters the tank at the rate 9 L/min. Determine amount of sugar in tank after t minutes.
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On expiration of your European $55 call upon XYZ stock, XYZ stock is selling for $58.43. What should you do? Hold upon to the option, and wait for the stock to go higher in value.
How many hours per week must Antonia spend on every exercise to maximize number of calories she burns? Determine maximum number of calories she will burn?
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