BUSC 2112 Week 11 – 20
PREVIEW:
Which of the following is the general solution of: A: The half-life of a certain substance is 3 hours. How long does it take so that only 1/10 of its original amount is left? A: 9.97 The decay rate of Ra-226 is 0.000436. What is its half-life in years? A: 1590 The half-life of Po-214 is 0.00014 second. Suppose a sample of this substance has a mass of 50 mg, how long must it take for its mass to decay so that only 40 mg is left? A: 0 Consider a certain substance with a half-life of 20 days. If this substance is initially 10 grams, how much of it will remain after 75 das? A: 0.74 Which of the following is the particular solution of: A: Which of the following is the particular solution of: A: Evaluate: A: 18 Evaluate: A: 11.25 A certain organism doubles in its size after every six hours. How many hours should pass so that it is 100 times bigger than it’s original size? A: 39.86 Evaluate: A: 2.67 Which of the following is the general solution of: A: A culture in the laboratory started with 500 basteria. Three hours later, the number of bacteria grew exponentially to 8,000. After how many hours will it’s population become 30,000? A: 4.43 Evaluate: A: 5.33 Evaluate: A: 13.08 Evaluate: A: 7.33 Suppose that a radioactive substance decays at a rate of 3.5% every hour. What percentage of it is left after 6 hours? A: 80.75 Which of the following is the general solution of: A: Evaluate: A: 5.27 Evaluate: A: 7.33 Which of the following is the general solution of: A: A whole roast chicken is taken from the oven when its temperature reached 185 degrees Fahrenheit. It is then placed on a table where the room temperature of viand is 150 degrees Fahrenheit. After how many minutes will the roast chicken cool to 100 degrees Fahrenheit? A: 116.05 A culture in the laboratory started with 500 basteria. Three hours later, the number of bacteria grew exponentially to 8,000. How many bacteria will be there after 4 hours? A: 20158.74 Which of the following is the general solution of: A: Which of the following is the general solution of: A: Evaluate: A: 0.14 A whole roast chicken is taken from the oven when its temperature reached 185 degrees Fahrenheit. It is then placed on a table where the room temperature is 75 degrees Fahrenheit. After thirty minutes, the temperature is 75 degrees Fahrenheit. After thirty minutes, the temperature of the viand is 150 degrees Fahrenheit. After 45 more, what is the temperature of the roast chicken (in Fahrenheit)? A: 163.93 Which of the following is the general solution of: A: Find the area underneath the curve. Write your answer corresponds to the problem below. Express your answer into 2 decimal places. A: 8.50 Find the area underneath the curve. Write your answer corresponds to the problem below. Express your answer into 2 decimal places. A: 12.67 Find the area underneath the curve. Write your answer corresponds to the problem below. Express your answer into 2 decimal places. A: 10.66 Find the area underneath the curve. Write your answer corresponds to the problem below. Express your answer into 2 decimal places. A: 9:00 Find the area underneath the curve. Write your answer corresponds to the problem below. Express your answer into 2 decimal places. A: 63.00 Evaluate: A: Evaluate: A: Evaluate: A: Evaluate: A: What is the definite integral of: A: 9 What is the definite integral of: A: 4.5 What is the definite integral of: A: 10.61 What is the definite integral of: A: 42 What is the definite integral of: A: 0 Evaluate: A: 13.08 Evaluate: A: 5.27 Evaluate: A: 5.33 Evaluate: A: 2.67 Evaluate: A: 7.33 Consider a certain substance with a half-life of 20 days. If this substance is initially 10 grams, how much of it will remain after 75 days?
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