Applied Calculus
7th Edition
ISBN: 9781337291248
Author: Waner, Stefan.
Publisher: Cengage Learning,
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Chapter 2.4, Problem 23E
(a)
To determine
The correct logistic function
The provided options are:
(A).
(B).
(C).
(D).
(b)
To determine
To calculate: what percentage was the number of articles growing around 1985 according to the obtained model from graph, graph is shown below:
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Applied Calculus
Ch. 2.1 - In Exercises 16, (a) state the values of a, b, and...Ch. 2.1 - In Exercises 16, (a) state the values of a, b, and...Ch. 2.1 - Prob. 3ECh. 2.1 - Prob. 4ECh. 2.1 - Prob. 5ECh. 2.1 - Prob. 6ECh. 2.1 - Prob. 7ECh. 2.1 - Prob. 8ECh. 2.1 - In Exercises 716, sketch the graph of the...Ch. 2.1 - Prob. 10E
Ch. 2.1 - Prob. 11ECh. 2.1 - Prob. 12ECh. 2.1 - Prob. 13ECh. 2.1 - Prob. 14ECh. 2.1 - Prob. 15ECh. 2.1 - Prob. 16ECh. 2.1 - In Exercises 1720, for each demand equation,...Ch. 2.1 - Prob. 18ECh. 2.1 - In Exercises 1720, for each demand equation,...Ch. 2.1 - In Exercises 1720, for each demand equation,...Ch. 2.1 - In Exercises 2124, use technology to find the...Ch. 2.1 - Prob. 22ECh. 2.1 - Prob. 23ECh. 2.1 - Prob. 24ECh. 2.1 - World Military Expenditure The following chart...Ch. 2.1 - Education Expenditure The following chart shows...Ch. 2.1 - Oil Imports from Mexico Crude oil imports to the...Ch. 2.1 - Oil Production in Mexico Crude oil production by...Ch. 2.1 - GE Net Income 20092013 The annual net income of...Ch. 2.1 - GE Net Income 20072011 The annual net income of...Ch. 2.1 - Revenue The market research department of the...Ch. 2.1 - Revenue The Better Baby Buggy Co. has just come...Ch. 2.1 - Revenue Pack-Em-In Real Estate is building a new...Ch. 2.1 - Revenue Pack-Em-In has another development in the...Ch. 2.1 - Revenue from Monorail Service, Las Vegas In 2005...Ch. 2.1 - Revenue from Monorail Service, Mars The Utarek...Ch. 2.1 - Website Profit You operate a gaming website,...Ch. 2.1 - T-Shirt Profit Two fraternities, Sig Ep and Ep...Ch. 2.1 - Website Profit The latest demand equation for your...Ch. 2.1 - T-Shirt Profit The latest demand equation for your...Ch. 2.1 - Nightclub Management You have just opened a new...Ch. 2.1 - Television Advertising As sales manager for...Ch. 2.1 - World Military Expenditure The following table...Ch. 2.1 - Prob. 44ECh. 2.1 - iPod Sales The following table shows Apple iPod...Ch. 2.1 - Prob. 46ECh. 2.1 - What can you say about the graph of f(x)=ax2+bx+c...Ch. 2.1 - What can you say about the graph of f(x)=ax2+bx+c...Ch. 2.1 - Multiple choice: Following is the graph of...Ch. 2.1 - Multiple choice: Following is the graph of...Ch. 2.1 - Refer to the graph of f(x)=ax2+bx+c in Exercise...Ch. 2.1 - Prob. 52ECh. 2.1 - Prob. 53ECh. 2.1 - Prob. 54ECh. 2.1 - Prob. 55ECh. 2.1 - Prob. 56ECh. 2.1 - Prob. 57ECh. 2.1 - Prob. 58ECh. 2.1 - Prob. 59ECh. 2.1 - Prob. 60ECh. 2.1 - If the revenue function for a particular commodity...Ch. 2.1 - If the revenue function for a particular commodity...Ch. 2.2 - In Exercises 1-12, compute the missing values in...Ch. 2.2 - Prob. 2ECh. 2.2 - In Exercises 1-12, compute the missing values in...Ch. 2.2 - In Exercises 1-12, compute the missing values in...Ch. 2.2 - In Exercises 1-12, compute the missing values in...Ch. 2.2 - In Exercises 1-12, compute the missing values in...Ch. 2.2 - Prob. 7ECh. 2.2 - Prob. 8ECh. 2.2 - Prob. 9ECh. 2.2 - Prob. 10ECh. 2.2 - Prob. 11ECh. 2.2 - Prob. 12ECh. 2.2 - In Exercises 13-18, graph the given function using...Ch. 2.2 - Prob. 14ECh. 2.2 - Prob. 15ECh. 2.2 - In Exercises 13-18, graph the given function using...Ch. 2.2 - Prob. 17ECh. 2.2 - In Exercises 13-18, graph the given function using...Ch. 2.2 - In Exercises 19-24 the values of two functions, f...Ch. 2.2 - In Exercises 19-24 the values of two functions, f...Ch. 2.2 - Prob. 21ECh. 2.2 - Prob. 22ECh. 2.2 - Prob. 23ECh. 2.2 - Prob. 24ECh. 2.2 - In Exercises 25-30, supply a valid technology...Ch. 2.2 - Prob. 26ECh. 2.2 - In Exercises 25-30, supply a valid technology...Ch. 2.2 - In Exercises 25-30, supply a valid technology...Ch. 2.2 - In Exercises 25-30, supply a valid technology...Ch. 2.2 - Prob. 30ECh. 2.2 - Prob. 31ECh. 2.2 - Prob. 32ECh. 2.2 - Prob. 33ECh. 2.2 - Prob. 34ECh. 2.2 - In Exercises 3138, supply a valid technology...Ch. 2.2 - Prob. 36ECh. 2.2 - Prob. 37ECh. 2.2 - Prob. 38ECh. 2.2 - Prob. 39ECh. 2.2 - Prob. 40ECh. 2.2 - Prob. 41ECh. 2.2 - Prob. 42ECh. 2.2 - Prob. 43ECh. 2.2 - Prob. 44ECh. 2.2 - Prob. 45ECh. 2.2 - Prob. 46ECh. 2.2 - In Exercises 47-54, model the data using an...Ch. 2.2 - Prob. 48ECh. 2.2 - Prob. 49ECh. 2.2 - Prob. 50ECh. 2.2 - In Exercises 47-54, model the data using an...Ch. 2.2 - Prob. 52ECh. 2.2 - In Exercises 47-54, model the data using an...Ch. 2.2 - Prob. 54ECh. 2.2 - Prob. 55ECh. 2.2 - Prob. 56ECh. 2.2 - In Exercises 55-62, find an equation for an...Ch. 2.2 - Prob. 58ECh. 2.2 - In Exercises 55-62, find an equation for an...Ch. 2.2 - Prob. 60ECh. 2.2 - Prob. 61ECh. 2.2 - Prob. 62ECh. 2.2 - In Exercises 63-66, obtain an exponential function...Ch. 2.2 - In Exercises 63-66, obtain an exponential function...Ch. 2.2 - In Exercises 63-66, obtain an exponential function...Ch. 2.2 - Prob. 66ECh. 2.2 - Prob. 67ECh. 2.2 - Prob. 68ECh. 2.2 - Prob. 69ECh. 2.2 - Prob. 70ECh. 2.2 - Aspirin Soon after taking an aspirin, a patient...Ch. 2.2 - Alcohol After a large number of drinks, a person...Ch. 2.2 - Freon Production The production of...Ch. 2.2 - Revenue The annual revenue of Amazon rose from...Ch. 2.2 - U.S. Population The U.S. population was 180...Ch. 2.2 - World Population World population was estimated at...Ch. 2.2 - Frogs Frogs have been breeding like flies at the...Ch. 2.2 - Flies Flies in Suffolk County have been breeding...Ch. 2.2 - Bacteria A bacteria culture starts with 1,000...Ch. 2.2 - Bacteria A bacteria culture starts with 1,000...Ch. 2.2 - Prob. 81ECh. 2.2 - The 2003 SARS Outbreak A few weeks into the deadly...Ch. 2.2 - Prob. 83ECh. 2.2 - Prob. 84ECh. 2.2 - Investments In August 2013, E*TRADE Financial was...Ch. 2.2 - Prob. 86ECh. 2.2 - Prob. 87ECh. 2.2 - Prob. 88ECh. 2.2 - Investments Rock Solid Bank Trust is offering a...Ch. 2.2 - Savings FlybynightSavings.com is offering a...Ch. 2.2 - Home Sales Sales of existing homes in the United...Ch. 2.2 - Home Prices The median selling price of an...Ch. 2.2 - Climate Change The most abundant greenhouse gas is...Ch. 2.2 - Prob. 94ECh. 2.2 - New York City Housing Costs: Downtown The...Ch. 2.2 - Prob. 96ECh. 2.2 - Prob. 97ECh. 2.2 - Prob. 98ECh. 2.2 - Prob. 99ECh. 2.2 - Which of the following three functions will be...Ch. 2.2 - Prob. 101ECh. 2.2 - Prob. 102ECh. 2.2 - Prob. 103ECh. 2.2 - Prob. 104ECh. 2.2 - Describe two real-life situations in which a...Ch. 2.2 - Describe a real-life situation in which a...Ch. 2.2 - Prob. 107ECh. 2.2 - Prob. 108ECh. 2.2 - Prob. 109ECh. 2.2 - Prob. 110ECh. 2.3 - If y=4x, then x=.Ch. 2.3 - If y=log6x, then x=.Ch. 2.3 - Simplify: 2log28.Ch. 2.3 - Simplify: elnx.Ch. 2.3 - Simplify: ln(ex).Ch. 2.3 - Simplify: lna.Ch. 2.3 - In Exercises 7-14, graph the given function....Ch. 2.3 - In Exercises 7-14, graph the given function....Ch. 2.3 - In Exercises 7-14, graph the given function....Ch. 2.3 - Prob. 10ECh. 2.3 - Prob. 11ECh. 2.3 - Prob. 12ECh. 2.3 - Prob. 13ECh. 2.3 - Prob. 14ECh. 2.3 - In Exercises 15-20, find the associated...Ch. 2.3 - In Exercises 15-20, find the associated...Ch. 2.3 - Prob. 17ECh. 2.3 - Prob. 18ECh. 2.3 - In Exercises 15-20, find the associated...Ch. 2.3 - In Exercises 15-20, find the associated...Ch. 2.3 - In Exercises 21-26, find the associated half-life...Ch. 2.3 - Prob. 22ECh. 2.3 - Prob. 23ECh. 2.3 - Prob. 24ECh. 2.3 - In Exercises 21-26, find the associated half-life...Ch. 2.3 - In Exercises 21-26, find the associated half-life...Ch. 2.3 - In Exercises 27-32, convert the given exponential...Ch. 2.3 - In Exercises 27-32, convert the given exponential...Ch. 2.3 - In Exercises 27-32, convert the given exponential...Ch. 2.3 - In Exercises 27-32, convert the given exponential...Ch. 2.3 - In Exercises 27-32, convert the given exponential...Ch. 2.3 - In Exercises 27-32, convert the given exponential...Ch. 2.3 - Investments How long will it take a $500...Ch. 2.3 - Investments How long will it take a $500...Ch. 2.3 - Investments How long, to the nearest year, will it...Ch. 2.3 - Investments How long, to the nearest year, will it...Ch. 2.3 - Prob. 37ECh. 2.3 - Depreciation My investment in OHaganBooks.com...Ch. 2.3 - Carbon Dating The amount of carbon 14 remaining in...Ch. 2.3 - Carbon Dating Refer to Exercise 39. How old, to...Ch. 2.3 - Long-Term Investments Exercises 41-48 are based on...Ch. 2.3 - Long-Term Investments Exercises 41-48 are based on...Ch. 2.3 - Long-Term Investments Exercises 41-48 are based on...Ch. 2.3 - Long-Term Investments Exercises 41-48 are based on...Ch. 2.3 - Long-Term Investments Exercises 41-48 are based on...Ch. 2.3 - Prob. 46ECh. 2.3 - Long-Term Investments Exercises 41-48 are based on...Ch. 2.3 - Prob. 48ECh. 2.3 - Half-Life The amount of radium 226 remaining in a...Ch. 2.3 - Half-Life The amount of iodine 131 remaining in a...Ch. 2.3 - Automobiles The rate of auto thefts triples every...Ch. 2.3 - Prob. 52ECh. 2.3 - Half-Life The half-life of cobalt 60 is 5 years....Ch. 2.3 - Half-Life The half-life of strontium 90 is 28...Ch. 2.3 - Radioactive Decay Uranium 235 is used as fuel for...Ch. 2.3 - Radioactive Decay Plutonium 239 is used as fuel...Ch. 2.3 - Prob. 57ECh. 2.3 - Alcohol After a large number of drinks, a person...Ch. 2.3 - Radioactive Decay You are trying to determine the...Ch. 2.3 - Prob. 60ECh. 2.3 - Population Aging The following table shows the...Ch. 2.3 - Prob. 62ECh. 2.3 - Prob. 63ECh. 2.3 - Prob. 64ECh. 2.3 - Richter Scale The Richter scale is used to measure...Ch. 2.3 - Sound Intensity The loudness of a sound is...Ch. 2.3 - Prob. 67ECh. 2.3 - Prob. 68ECh. 2.3 - Prob. 69ECh. 2.3 - Prob. 70ECh. 2.3 - Prob. 71ECh. 2.3 - Prob. 72ECh. 2.3 - Prob. 73ECh. 2.3 - Prob. 74ECh. 2.3 - Prob. 75ECh. 2.3 - Prob. 76ECh. 2.3 - Prob. 77ECh. 2.4 - Prob. 1ECh. 2.4 - Prob. 2ECh. 2.4 - Prob. 3ECh. 2.4 - Prob. 4ECh. 2.4 - Prob. 5ECh. 2.4 - Prob. 6ECh. 2.4 - Prob. 7ECh. 2.4 - In Exercises 7-10, find the logistic function f...Ch. 2.4 - Prob. 9ECh. 2.4 - Prob. 10ECh. 2.4 - Prob. 11ECh. 2.4 - Prob. 12ECh. 2.4 - Prob. 13ECh. 2.4 - In Exercises 11-16, choose the logistic function...Ch. 2.4 - Prob. 15ECh. 2.4 - Prob. 16ECh. 2.4 - Prob. 17ECh. 2.4 - Prob. 18ECh. 2.4 - Prob. 19ECh. 2.4 - Prob. 20ECh. 2.4 - Prob. 21ECh. 2.4 - Prob. 22ECh. 2.4 - Prob. 23ECh. 2.4 - Prob. 24ECh. 2.4 - Prob. 25ECh. 2.4 - Internet Use The following graph shows the...Ch. 2.4 - Epidemics There are currently 1,000 cases of...Ch. 2.4 - Prob. 28ECh. 2.4 - Sales You have sold 100 I Calculus T-shirts, and...Ch. 2.4 - Sales In Russia the average consumer drank two...Ch. 2.4 - Prob. 31ECh. 2.4 - College Basketball: Men The following table shows...Ch. 2.4 - College Basketball: Women The following table...Ch. 2.4 - Prob. 35ECh. 2.4 - Exercises 35 and 36 are based on the discussion...Ch. 2.4 - Prob. 37ECh. 2.4 - Prob. 38ECh. 2.4 - Give one practical use for logistic regression.Ch. 2.4 - Prob. 40ECh. 2.4 - Prob. 41ECh. 2.4 - Prob. 42ECh. 2.4 - Prob. 43ECh. 2.4 - Prob. 44ECh. 2 - Sketch the graph of the quadratic functions in...Ch. 2 - Prob. 2RECh. 2 - Prob. 3RECh. 2 - Prob. 4RECh. 2 - Prob. 5RECh. 2 - Prob. 6RECh. 2 - Prob. 7RECh. 2 - Prob. 8RECh. 2 - Prob. 9RECh. 2 - Prob. 10RECh. 2 - Prob. 11RECh. 2 - Prob. 12RECh. 2 - Prob. 13RECh. 2 - Prob. 14RECh. 2 - In Exercises 15-18, find a formula of the form...Ch. 2 - Prob. 16RECh. 2 - In Exercises 15-18, find a formula of the form...Ch. 2 - Prob. 18RECh. 2 - Prob. 19RECh. 2 - Prob. 20RECh. 2 - Prob. 21RECh. 2 - Prob. 22RECh. 2 - Prob. 23RECh. 2 - Prob. 24RECh. 2 - Prob. 25RECh. 2 - Prob. 26RECh. 2 - Prob. 27RECh. 2 - Prob. 28RECh. 2 - Prob. 29RECh. 2 - Prob. 30RECh. 2 - Prob. 31RECh. 2 - Prob. 32RECh. 2 - Prob. 33RECh. 2 - Prob. 35RECh. 2 - Revenue and Profit Billy-Sean OHagan is John...Ch. 2 - Prob. 37RECh. 2 - Prob. 38RECh. 2 - Prob. 39RECh. 2 - Prob. 40RECh. 2 - Lobsters We saw in Exercise 37 that the Long...Ch. 2 - Prob. 42RECh. 2 - Prob. 43RECh. 2 - Prob. 44RECh. 2 - Prob. 45RECh. 2 - Prob. 50RE
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- The population of a lake of fish is modeled by the logistic equation P(t)=16,1201+25e0.75t, where t is time inyears. To the unrest hundredth, how manyyears will it take the lake to reach 80% of its carrying capacity?For the following exercises, use a graphing utility to create a scatter diagram of the data given in the table.Observe the shape of the scatter diagram to determine whether the data is best described by an exponential,logarithmic, or logistic model. Then use the appropriate regression feature to find an equation that models thedata. When necessary, round values to five decimal places.arrow_forwardModeling Human Height with a Logistic Function A male child is 21inches long at birth and grows to an adult height of 73inches. In this exercise, we make a logistic model of his height as a function of age. a. Use the given information to find K and b for the logistic model. b. Suppose he reaches 95 of his adult height at age 16. Use this information and that from part a to find r. Suggestion: You will need to use either the crossing-graphs method or some algebra involving the logarithm. c. Make a logistic model for his height H, in inches, as a function of his age t, in years. d. According to the logistic model, at what age is he growing the fastest? e. Is your answer to part d consistent with your knowledge of how humans grow?arrow_forwardWhat situations are best modeled by a logistic equation? Give an example, and state a case for why the example is a good fit.arrow_forward
- A Population of Foxes A breeding group of foxes is introduced into a protected are and exhibits logistic population growth. After t years, the number of foxes is given by N(t)=37.50.25+0.76t foxes. a. How many foxes were introduced into the protected area? b. Calculate N(5) and explain the meaning of the number you have calculated. c. Explain how the population varies with time. Include in your explanation the average rate of increase over the first 10-year period and the average rate of increase over the second 10-year period. d. Find the carrying capacity for foxes in the protected area. e. As we saw in the discussion of terminal velocity for a skydiver, the question of when the carrying capacity is reached may lead to an involved discussion. We ask the question differently. When is 99 of carrying capacity reached?arrow_forwardWorld Population The following table shows world population N, in billions, in the given year. Year 1950 1960 1970 1980 1990 2000 2010 N 2.56 3.04 3.71 4.45 5.29 6.09 6.85 a. Use regression to find a logistic model for world population. b. What r value do these data yield for humans on planet Earth? c. According to the logistic model using these data, what is the carrying capacity of planet Earth for humans? d. According to this model, when will world population reach 90 of carrying capacity? Round to the nearest year. Note: This represents a rather naive analysis of world population.arrow_forwardEastern Pacific Yellowfin Tuna Studies to fit a logistic model to the Eastern Pacific yellowfin tuna population have yielded N=1481+36e2.61t where t is measured in years and N is measured in thousands of tons of fish. a. What is the r value for the Eastern Pacific yellowfin tuna? b. What is the carrying capacity K for the Eastern Pacific yellowfin tuna? c. What is the optimum yield level? d. Use your calculator to graph N versus t. e. At what time was the population growing the most rapidly?arrow_forward
- Cable TV The following table shows the number C. in millions, of basic subscribers to cable TV in the indicated year These data are from the Statistical Abstract of the United States. Year 1975 1980 1985 1990 1995 2000 C 9.8 17.5 35.4 50.5 60.6 60.6 a. Use regression to find a logistic model for these data. b. By what annual percentage would you expect the number of cable subscribers to grow in the absence of limiting factors? c. The estimated number of subscribers in 2005 was 65.3million. What light does this shed on the model you found in part a?arrow_forwardMore on the Pacific Sardine This is a continuation of Example 5.1. In this exercise, we explore the Pacific sardine population further, using the model in Example 5.1. a. If the current level of the Pacific sardine population is 50,000 tons, how long will it take for the population to recover to the optimum growth level of 1.2milliontons? Suggestion: One way to solve this is to make a new logistic formula using K2.4, r0.338, and N(0)0.05. b. The value of r used in Example 5.1 ignores the effects of fishing. If fishing mortality is taken into account, then r drops to 0.215 per year with the carrying capacity still at 2.4milliontons. Answer the question in part a using this lower value of r. Note: The population estimate of 50,000 tons and the adjusted value of r are given in the paper by Murphy see footnote 3 on page 347. Murphy points out that factoring in the growth of the competing anchovy population makes the recovery times even longer, and he adds. "It is disconcerting to realize how slowly the population will recover to its level of maximum productivity ... even if fishing stops." Studies to fit a logistic model to the Pacific sardine population have yielded. N=241+239e0.338t where t is measured in years and N is measured in millions of tons of fish. Part 1 What is r for the Pacific sardine? Part 2 According to the logistic model, in the absence of limiting factors, what would be the annual percentage growth rate for the Pacific sardine? Part 3 What is the environmental carrying capacity K? Part 4 What is the optimum yield level? Part 5 Make a graph of N versus t. Part 6 At what time t should the population he harvested? Part 7 What portion of the graph is concave up? What portion is concave down?arrow_forwardTable 6 shows the population, in thousands, of harbor seals in the Wadden Sea over the years 1997 to 2012. a. Let x represent time in years starting with x=0 for the year 1997. Let y represent the number of seals in thousands. Use logistic regression to fit a model to these data. b. Use the model to predict the seal population for the year 2020. c. To the nearest whole number, what is the limiting value of this model?arrow_forward
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