Pearson eText for Calculus & Its Applications -- Instant Access (Pearson+)
14th Edition
ISBN: 9780137400096
Author: Larry Goldstein, David Lay
Publisher: PEARSON+
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Textbook Question
Chapter 5.1, Problem 45E
Radioactive Decay A sample of radioactive material decays over time (measured in hours) with decay constant
a. How much was remaining after
b. Approximate the half-life of the material.
c. How fast was the sample decaying after
d. When was the sample decaying at the rate of
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Chapter 5 Solutions
Pearson eText for Calculus & Its Applications -- Instant Access (Pearson+)
Ch. 5.1 - a. Solve the differential equation...Ch. 5.1 - Under ideal conditions a colony of Escherichia...Ch. 5.1 - In Exercises 110, determine the growth constant k,...Ch. 5.1 - In Exercises 110, determine the growth constant k,...Ch. 5.1 - In Exercises 110, determine the growth constant k,...Ch. 5.1 - In Exercises 110, determine the growth constant k,...Ch. 5.1 - In Exercises 110, determine the growth constant k,...Ch. 5.1 - In Exercises 110, determine the growth constant k,...Ch. 5.1 - In Exercises 110, determine the growth constant k,...Ch. 5.1 - In Exercises 110, determine the growth constant k,...
Ch. 5.1 - In Exercises 110, determine the growth constant k,...Ch. 5.1 - In Exercises 110, determine the growth constant k,...Ch. 5.1 - In Exercises 1118, solve the given differential...Ch. 5.1 - In Exercises 1118, solve the given differential...Ch. 5.1 - In Exercises 1118, solve the given differential...Ch. 5.1 - In Exercises 1118, solve the given differential...Ch. 5.1 - In Exercises 1118, solve the given differential...Ch. 5.1 - In Exercises 1118, solve the given differential...Ch. 5.1 - In Exercises 1118, solve the given differential...Ch. 5.1 - In Exercises 1118, solve the given differential...Ch. 5.1 - Population and Exponential Growth Let P(t) be the...Ch. 5.1 - Growth of a Colony of Fruit Flies A colony of...Ch. 5.1 - GrowthConstant for a Bacteria Culture Abacteria...Ch. 5.1 - Growth of a Bacteria Culture The initial size of a...Ch. 5.1 - Using the Differential Equation Let P(t) be the...Ch. 5.1 - Growth of Bacteria Approximately 10,000 bacteria...Ch. 5.1 - Growth of cells After t hours, there are P(t)...Ch. 5.1 - Insect Population The size of a certain insect...Ch. 5.1 - Population Growth Determine the growth constant of...Ch. 5.1 - Time to Triple Determine the growth constant of a...Ch. 5.1 - Exponential Growth A population is growing...Ch. 5.1 - Time to DoubleA population is growing...Ch. 5.1 - Exponential Growth The rate of growth of a certain...Ch. 5.1 - Worlds Population The worlds population was 5.51...Ch. 5.1 - Prob. 33ECh. 5.1 - A Population Model The population (in millions) of...Ch. 5.1 - Radioactive Decay A sample of 8 grams of...Ch. 5.1 - Radioactive Decay Radium 226 is used in cancer...Ch. 5.1 - Decay of Penicillin in the Bloodstream A person is...Ch. 5.1 - Radioactive Decay Ten grams of a radioactive...Ch. 5.1 - Radioactive Decay The decay constant for the...Ch. 5.1 - Drug ConstantRadioactive cobalt 60 has a half-life...Ch. 5.1 - Iodine Level in Dairy Products If dairy cows eat...Ch. 5.1 - Half-Life Ten grams of a radioactive material...Ch. 5.1 - Decay of Sulfate in the Bloodstream In an animal...Ch. 5.1 - Radioactive Decay Forty grams of a certain...Ch. 5.1 - Radioactive Decay A sample of radioactive material...Ch. 5.1 - Rate of Decay A sample of radioactive material has...Ch. 5.1 - Carbon Dating In 1947, a cave with beautiful...Ch. 5.1 - King Arthur's Round Table According to legend, in...Ch. 5.1 - Prob. 49ECh. 5.1 - Population of the PacificNorthwest In 1938,...Ch. 5.1 - Time of the Fourth Ice Age Many scientists believe...Ch. 5.1 - Time Constant Let T be the time constant of the...Ch. 5.1 - Prob. 53ECh. 5.1 - Time Constant and Half-life Consider as...Ch. 5.1 - An Initial Value Problem Suppose that the function...Ch. 5.1 - Time to Finish Consider the exponential decay...Ch. 5.2 - One thousand dollars is to be invested in a bank...Ch. 5.2 - A building was bought for 150,000 and sold 10...Ch. 5.2 - Savings Account Let A(t)=5000e0.04t be the balance...Ch. 5.2 - Savings Account Let A(t) be the balance in a...Ch. 5.2 - Savings Account Four thousand dollars is deposited...Ch. 5.2 - Savings Account Ten thousand dollars is deposited...Ch. 5.2 - Investment AnalysisAn investment earns 4.2 yearly...Ch. 5.2 - Investment Analysis An investment earns 5.1 yearly...Ch. 5.2 - Continuous Compound One thousand dollars is...Ch. 5.2 - Continuous Compound Ten thousand dollars is...Ch. 5.2 - Technology Stock One hundred shares of a...Ch. 5.2 - Appreciation of Art Work Pablo Picassos Angel...Ch. 5.2 - Investment Analysis How many years are required...Ch. 5.2 - Doubling an Investment What yearly interest rate...Ch. 5.2 - Tripling an Investment If an investment triples in...Ch. 5.2 - Prob. 14ECh. 5.2 - Prob. 15ECh. 5.2 - Prob. 16ECh. 5.2 - Real Estate Investment A farm purchased in 2000...Ch. 5.2 - Real Estate Investment A parcel of land bought in...Ch. 5.2 - Present Value Find the present value of 1000...Ch. 5.2 - Prob. 20ECh. 5.2 - Present Value How much money must you invest now...Ch. 5.2 - Present Value If the present value of 1000 to be...Ch. 5.2 - Prob. 23ECh. 5.2 - Prob. 24ECh. 5.2 - Differential Equation and InterestA small amount...Ch. 5.2 - Prob. 26ECh. 5.2 - Prob. 27ECh. 5.2 - Prob. 28ECh. 5.2 - Prob. 29ECh. 5.2 - Prob. 30ECh. 5.2 - Prob. 31ECh. 5.3 - The current toll for the use of a certain toll...Ch. 5.3 - The current toll for the use of a certain toll...Ch. 5.3 - The current toll for the use of a certain toll...Ch. 5.3 - Find the logarithmic derivative and then determine...Ch. 5.3 - Prob. 2ECh. 5.3 - Find the logarithmic derivative and then determine...Ch. 5.3 - Find the logarithmic derivative and then determine...Ch. 5.3 - Find the logarithmic derivative and then determine...Ch. 5.3 - Prob. 6ECh. 5.3 - Find the logarithmic derivative and then determine...Ch. 5.3 - Prob. 8ECh. 5.3 - Percentage Rate of Growth The annual sales S(in...Ch. 5.3 - Prob. 10ECh. 5.3 - Price of Ground Beef The wholesale price in...Ch. 5.3 - Price of Pork The wholesale price in dollars of...Ch. 5.3 - For each demand function, find E(p) and determine...Ch. 5.3 - Prob. 14ECh. 5.3 - For each demand function, find E(p) and determine...Ch. 5.3 - For each demand function, find E(p) and determine...Ch. 5.3 - For each demand function, find E(p) and determine...Ch. 5.3 - Prob. 18ECh. 5.3 - Elasticity of Demand Currently 1800 people ride a...Ch. 5.3 - Prob. 20ECh. 5.3 - Elasticity of Demand A movie theater has a seating...Ch. 5.3 - Prob. 22ECh. 5.3 - Elasticity of Demand A country that is the major...Ch. 5.3 - Prob. 24ECh. 5.3 - Prob. 25ECh. 5.3 - Prob. 26ECh. 5.3 - Prob. 27ECh. 5.3 - Prob. 28ECh. 5.3 - Prob. 29ECh. 5.4 - A sociological study was made to examine the...Ch. 5.4 - Consider the function f(x)=5(1e2x), x0. a. Show...Ch. 5.4 - Prob. 2ECh. 5.4 - Prob. 3ECh. 5.4 - Prob. 4ECh. 5.4 - Prob. 5ECh. 5.4 - Ebbinghaus Model for Forgetting A student learns a...Ch. 5.4 - Spread of News When a grand jury indicted the...Ch. 5.4 - Prob. 8ECh. 5.4 - Spread of News A news item is spread by word of...Ch. 5.4 - Prob. 10ECh. 5.4 - Spread of News A news item is broadcast by mass...Ch. 5.4 - Glucose Elimination Describe an experiment that a...Ch. 5.4 - Amount of a Drug in the Bloodstream After a drug...Ch. 5.4 - Growth with Restriction A model incorporating...Ch. 5 - What differential equation is key to solving...Ch. 5 - Prob. 2CCECh. 5 - Prob. 3CCECh. 5 - Explain how radiocarbon dating works.Ch. 5 - Prob. 5CCECh. 5 - Prob. 6CCECh. 5 - Define the elasticity of demand, E(p), for a...Ch. 5 - Describe an application of the differential...Ch. 5 - Prob. 9CCECh. 5 - Atmospheric Pressure The atmospheric pressure...Ch. 5 - Population Model The herring gull population in...Ch. 5 - Present Value Find the present value of 10,000...Ch. 5 - Compound Interest One thousand dollars is...Ch. 5 - Half-Life The half-life of the radioactive element...Ch. 5 - Carbon Dating A piece of charcoal found at...Ch. 5 - Population Model From January 1, 2010, to January...Ch. 5 - Compound Interest A stock portfolio increased in...Ch. 5 - Comparing Investments An investor initially...Ch. 5 - Bacteria Growth Two different bacteria colonies...Ch. 5 - Population Model The population of a city t years...Ch. 5 - Bacteria Growth A colony of bacteria is growing...Ch. 5 - Population Model The population of a certain...Ch. 5 - Radioactive Decay You have 80 grams of a certain...Ch. 5 - Compound Interest A few years after money is...Ch. 5 - Compound Interest The current balance in a savings...Ch. 5 - Find the percentage rate of change of the function...Ch. 5 - Find E(p) for the demand function q=400040p2, and...Ch. 5 - Elasticity of Demand For a certain demand...Ch. 5 - Find the percentage rate of change of the function...Ch. 5 - Elasticity of Demand Company can sell...Ch. 5 - Elasticity of Demand Consider a demand function of...Ch. 5 - Refer to Check Your Understanding 5.4. Out of 100...Ch. 5 - Height of a Weed The growth of the yellow nutsedge...Ch. 5 - Temperature of a Rod When a rod of molten steel...Ch. 5 - Prob. 26RE
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