Functions and Change: A Modeling Approach to College Algebra (MindTap Course List)
6th Edition
ISBN: 9781337111348
Author: Bruce Crauder, Benny Evans, Alan Noell
Publisher: Cengage Learning
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Functions and Change: A Modeling Approach to College Algebra (MindTap Course List)
Ch. 5.1 - TEST YOUR UNDERSTANDING Another fish population...Ch. 5.1 - Prob. 2TUCh. 5.1 - Prob. 3TUCh. 5.1 - Special Rounding instructions When you perform...Ch. 5.1 - Special Rounding Instructions When you perform...Ch. 5.1 - Special Rounding Instructions When you perform...Ch. 5.1 - Special Rounding Instructions When you perform...Ch. 5.1 - Special Rounding Instructions When you perform...Ch. 5.1 - Special Rounding Instructions When you perform...Ch. 5.1 - Special Rounding Instructions When you perform...
Ch. 5.1 - Special Rounding Instructions When you perform...Ch. 5.1 - Special Rounding Instructions When you perform...Ch. 5.1 - Prob. 11ECh. 5.1 - Special Rounding Instructions When you perform...Ch. 5.1 - Prob. 13ECh. 5.1 - Long-Term Data and the Carrying Capacity This is a...Ch. 5.1 - Prob. 15ECh. 5.1 - Cable TV The following table shows the number C....Ch. 5.1 - World Population The following table shows world...Ch. 5.1 - Prob. 18ECh. 5.1 - More on the Pacific Sardine This is a continuation...Ch. 5.1 - Modeling Human Height with a Logistic Function A...Ch. 5.1 - Eastern Pacific Yellowfin Tuna Studies to fit a...Ch. 5.1 - Prob. 22ECh. 5.1 - Special Rounding Instructions When you perform...Ch. 5.1 - Prob. 24ECh. 5.1 - SKILL BUILDING EXERCISES Estimating Optimum Yield...Ch. 5.1 - SKILL BUILDING EXERCISES Estimating Carrying...Ch. 5.1 - SKILL BUILDING EXERCISES Logistic GrowthWhen we...Ch. 5.1 - SKILL BUILDING EXERCISES Percentage Rate of Change...Ch. 5.1 - SKILL BUILDING EXERCISES HarvestingWhat is the...Ch. 5.1 - SKILL BUILDING EXERCISES Harvesting Suppose a...Ch. 5.1 - SKILL BUILDING EXERCISES Harvesting Continued The...Ch. 5.1 - SKILL BUILDING EXERCISES Finding Logistic...Ch. 5.1 - Prob. 9SBECh. 5.1 - Prob. 10SBECh. 5.1 - Prob. 11SBECh. 5.1 - Prob. 12SBECh. 5.1 - Prob. 13SBECh. 5.1 - Prob. 14SBECh. 5.1 - Prob. 15SBECh. 5.1 - Prob. 16SBECh. 5.1 - Prob. 17SBECh. 5.1 - Prob. 18SBECh. 5.1 - Prob. 19SBECh. 5.1 - Prob. 20SBECh. 5.1 - Prob. 21SBECh. 5.1 - Prob. 22SBECh. 5.1 - Prob. 23SBECh. 5.1 - Prob. 24SBECh. 5.1 - Prob. 25SBECh. 5.1 - Prob. 26SBECh. 5.1 - Prob. 27SBECh. 5.1 - Prob. 28SBECh. 5.1 - Prob. 29SBECh. 5.1 - Prob. 30SBECh. 5.1 - Prob. 31SBECh. 5.1 - Prob. 32SBECh. 5.1 - Prob. 33SBECh. 5.1 - Prob. 34SBECh. 5.1 - Prob. 35SBECh. 5.1 - Prob. 36SBECh. 5.1 - Prob. 37SBECh. 5.2 - TEST YOUR UNDERSTANDING In the situation of the...Ch. 5.2 - Prob. 2TUCh. 5.2 - Prob. 3TUCh. 5.2 - Prob. 1ECh. 5.2 - Reminder Round all answers to two decimal places...Ch. 5.2 - Reminder Round all answers to two decimal places...Ch. 5.2 - Prob. 4ECh. 5.2 - Reminder Round all answers to two decimal places...Ch. 5.2 - Prob. 6ECh. 5.2 - Prob. 7ECh. 5.2 - Prob. 8ECh. 5.2 - Prob. 9ECh. 5.2 - Reminder Round all answers to two decimal places...Ch. 5.2 - Reminder Round all answers to two decimal places...Ch. 5.2 - Reminder Round all answers to two decimal places...Ch. 5.2 - Reminder Round all answers to two decimal places...Ch. 5.2 - Reminder Round all answers to two decimal places...Ch. 5.2 - Prob. 15ECh. 5.2 - Reminder Round all answers to two decimal places...Ch. 5.2 - Tsunami Waves and BreakwatersThis is a...Ch. 5.2 - Reminder Round all answers to two decimal places...Ch. 5.2 - Prob. 19ECh. 5.2 - Prob. 20ECh. 5.2 - Prob. 21ECh. 5.2 - Prob. 22ECh. 5.2 - Reminder Round all answers to two decimal places...Ch. 5.2 - Prob. 24ECh. 5.2 - Prob. 25ECh. 5.2 - Prob. 1SBECh. 5.2 - Prob. 2SBECh. 5.2 - Prob. 3SBECh. 5.2 - Prob. 4SBECh. 5.2 - Prob. 5SBECh. 5.2 - Prob. 6SBECh. 5.2 - HomogeneityExercises S-7 through S-I3 deal with...Ch. 5.2 - Homogeneity Exercises S-7 through S-13 deal with...Ch. 5.2 - HomogeneityExercises S-7 through S-I3 deal with...Ch. 5.2 - Prob. 10SBECh. 5.2 - Prob. 11SBECh. 5.2 - Homogeneity Exercises S-7 through S-13 deal with...Ch. 5.2 - Prob. 13SBECh. 5.2 - Prob. 14SBECh. 5.2 - Prob. 15SBECh. 5.2 - Prob. 16SBECh. 5.2 - Making Power FormulasIn Exercises S-16 through...Ch. 5.2 - Prob. 18SBECh. 5.2 - Making Power FormulasIn Exercises S-16 through...Ch. 5.2 - Prob. 20SBECh. 5.3 - Prob. 1TUCh. 5.3 - Prob. 2TUCh. 5.3 - Prob. 3TUCh. 5.3 - Zipfs Law The following table shows U.S cities by...Ch. 5.3 - Planetary Velocity The following table gives the...Ch. 5.3 - Stopping Distance The table below shows the...Ch. 5.3 - Distance to the Horizon A sailor records the...Ch. 5.3 - Hydroplaning On wet roads, under certain...Ch. 5.3 - Urban Travel Times Population of cities and...Ch. 5.3 - Mass-Luminosity Relation Roughly 90 of all stars...Ch. 5.3 - Growth Rate Versus Weight Ecologists have studied...Ch. 5.3 - Prob. 9ECh. 5.3 - Prob. 10ECh. 5.3 - Prob. 11ECh. 5.3 - Prob. 12ECh. 5.3 - Prob. 13ECh. 5.3 - Prob. 14ECh. 5.3 - Prob. 15ECh. 5.3 - Prob. 16ECh. 5.3 - Prob. 17ECh. 5.3 - Reminder Round all answers to two decimal places...Ch. 5.3 - Prob. 19ECh. 5.3 - Weight Versus Height The following data show the...Ch. 5.3 - Prob. 21ECh. 5.3 - Prob. 22ECh. 5.3 - Prob. 1SBECh. 5.3 - Prob. 2SBECh. 5.3 - Prob. 3SBECh. 5.3 - Prob. 4SBECh. 5.3 - An Easy Power Formula Model the following data...Ch. 5.3 - Prob. 6SBECh. 5.3 - Prob. 7SBECh. 5.3 - Prob. 8SBECh. 5.3 - Prob. 9SBECh. 5.3 - Prob. 10SBECh. 5.3 - Prob. 11SBECh. 5.3 - Prob. 12SBECh. 5.3 - Prob. 13SBECh. 5.3 - Prob. 14SBECh. 5.3 - Prob. 15SBECh. 5.3 - Prob. 16SBECh. 5.3 - Prob. 17SBECh. 5.4 - TEST YOUR UNDERSTANDING | FOR EXAMPLE 5.10 When...Ch. 5.4 - Prob. 2TUCh. 5.4 - TEST YOUR UNDERSTANDING | FOR EXAMPLE 5.12 Find a...Ch. 5.4 - Prob. 4TUCh. 5.4 - EXERCISES Reminder Round all answers to two...Ch. 5.4 - Round all answers to two decimal places unless...Ch. 5.4 - EXERCISE River flow The cross sectional area C, in...Ch. 5.4 - EXERCISES Net Profit Margin The net profit margin...Ch. 5.4 - A Skydiver If a skydiver jumps from an airplane,...Ch. 5.4 - Present Value If you invest P dollars the present...Ch. 5.4 - Prob. 7ECh. 5.4 - Prob. 8ECh. 5.4 - Prob. 9ECh. 5.4 - Reminder Round all answers to two decimal places...Ch. 5.4 - Reminder Round all answers to two decimal places...Ch. 5.4 - Average Traffic Spacing The headway h is the...Ch. 5.4 - Prob. 13ECh. 5.4 - Decay of Litter Litter such as leaves falls to the...Ch. 5.4 - Prob. 15ECh. 5.4 - Reminder Round all answers to two decimal places...Ch. 5.4 - Reminder Round all answers to two decimal places...Ch. 5.4 - Prob. 18ECh. 5.4 - Reminder Round all answers to two decimal places...Ch. 5.4 - Prob. 20ECh. 5.4 - SKILL BUILDING EXERCISES Formula for Composed...Ch. 5.4 - SKILL BUILDING EXERCISES Formula for Composed...Ch. 5.4 - SKILL BUILDING EXERCISES Formulas for Composed...Ch. 5.4 - SKILL BUILDING EXERCISES Formula for Composed...Ch. 5.4 - Formulas for Composed functions In Exercises S-5...Ch. 5.4 - Formulas for Composed functions In Exercises S-5...Ch. 5.4 - Formulas for Composed functions In Exercises S-5...Ch. 5.4 - Formulas for Composed functions In Exercises S-5...Ch. 5.4 - Limiting values Find the limiting value of...Ch. 5.4 - Multiplying Functions A certain function f is the...Ch. 5.4 - Adding Functions A certain function f is the sum...Ch. 5.4 - Decomposing Functions Let f(x)=x2 and g(x)=x+1....Ch. 5.4 - Decomposing Functions If f(x)=x2+3, express f as a...Ch. 5.4 - Prob. 14SBECh. 5.4 - Decomposing Functions To join a book club, you pay...Ch. 5.4 - Prob. 16SBECh. 5.4 - Combining Functions Let f(x)=x21 and g(x)=1x. Find...Ch. 5.5 - TEST FOR UNDERSTANDING FOR EXAMPLE 5.14 Find a...Ch. 5.5 - TEST YOUR UNDERSTANDINGFOR EXAMPLE 5.15 What range...Ch. 5.5 - TEST FOR UNDERSTANDING FOR EXAMPLE 5.16 In the...Ch. 5.5 - Reminder Round all the answers to two decimal...Ch. 5.5 - Reminder Round all the answers to two decimal...Ch. 5.5 - Reminder Round all the answers to two decimal...Ch. 5.5 - 5.5 EXERCISES Reminder Round all answers to two...Ch. 5.5 - Reminder Round all answers to two decimal places...Ch. 5.5 - Reminder Round all the answers to two decimal...Ch. 5.5 - Reminder Round all the answers to two decimal...Ch. 5.5 - Reminder Round all the answers to two decimal...Ch. 5.5 - Reminder Round all the answers to two decimal...Ch. 5.5 - Reminder Round all the answers to two decimal...Ch. 5.5 - Reminder Round all answers to two decimal places...Ch. 5.5 - Prob. 12ECh. 5.5 - Reminder Round all the answers to two decimal...Ch. 5.5 - Reminder Round all answers to two decimal places...Ch. 5.5 - Reminder Round all answers to two decimal places...Ch. 5.5 - Prob. 16ECh. 5.5 - 5.5 SKILL BUILDING EXERCISES Using the Quadratic...Ch. 5.5 - 5.5 SKILL BUILDING EXERCISES Using the Quadratic...Ch. 5.5 - 5.5 SKILL BUILDING EXERCISES Using the Quadratic...Ch. 5.5 - 5.5 SKILL BUILDING EXERCISES Using the Quadratic...Ch. 5.5 - 5.5 SKILL BUILDING EXERCISES Using the Quadratic...Ch. 5.5 - Prob. 6SBECh. 5.5 - The Single-Graph method In Exercises S-7 through...Ch. 5.5 - Prob. 8SBECh. 5.5 - Prob. 9SBECh. 5.5 - Prob. 10SBECh. 5.5 - Prob. 11SBECh. 5.5 - Prob. 12SBECh. 5.5 - Prob. 13SBECh. 5.5 - Prob. 14SBECh. 5.5 - Prob. 15SBECh. 5.5 - Prob. 16SBECh. 5.5 - Prob. 17SBECh. 5.5 - Prob. 18SBECh. 5.5 - Prob. 19SBECh. 5.5 - Using Quadratic Regression In Exercises S-13...Ch. 5.6 - The following fictitious table shows kryptonite...Ch. 5.6 - According to Doyle log rule, the length L in feet,...Ch. 5.6 - Prob. 3TUCh. 5.6 - A Dubious Model of Oil Prices The following table...Ch. 5.6 - Speed of Sound in the North Atlantic The speed of...Ch. 5.6 - Traffic Accidents The following table shows the...Ch. 5.6 - Poiseuilles Law for Rate of Fluid Flow Poiseuilles...Ch. 5.6 - Population Genetics In the study of population...Ch. 5.6 - Population Genetics-First Cousins This is a...Ch. 5.6 - Builders old measurement was instituted by law in...Ch. 5.6 - Change in London Travel Time This exercise is a...Ch. 5.6 - An Epidemic Model A certain disease is contracted...Ch. 5.6 - Prob. 10ECh. 5.6 - Prob. 11ECh. 5.6 - C of these fish caught by fishing over the life...Ch. 5.6 - Prob. 13ECh. 5.6 - Prob. 14ECh. 5.6 - 13. Inventory The yearly inventory expense E, in...Ch. 5.6 - Prob. 16ECh. 5.6 - Prob. 17ECh. 5.6 - Prob. 18ECh. 5.6 - Prob. 19ECh. 5.6 - Prob. 20ECh. 5.6 - Cubic Regression In Exercise S-1 through S-7, use...Ch. 5.6 - Cubic Regression In Exercise S-1 through S-7, use...Ch. 5.6 - Cubic Regression In Exercise S-1 through S-7, use...Ch. 5.6 - Prob. 4SBECh. 5.6 - Prob. 5SBECh. 5.6 - Cubic Regression In Exercise S-1 through S-7, use...Ch. 5.6 - Prob. 7SBECh. 5.6 - Prob. 8SBECh. 5.6 - Prob. 9SBECh. 5.6 - Prob. 10SBECh. 5.6 - Prob. 11SBECh. 5.6 - Prob. 12SBECh. 5.6 - Prob. 13SBECh. 5.6 - Quartic Regression In Exercise S-8 through S-14,...Ch. 5.6 - Recognizing Polynomials In Exercise S-15 through...Ch. 5.6 - Recognizing Polynomials In Exercise S-15 through...Ch. 5.6 - Recognizing Polynomials In Exercise S-15 through...Ch. 5.6 - Recognizing Polynomials In Exercise S-15 through...Ch. 5.6 - Rational Function Is y=xx1+x a rational function?Ch. 5.6 - S-20 Rational Function Is y=x3+4x2+x+1 is a...Ch. 5.6 - Rational Function? Is y=x+1x2 is a rational...Ch. 5.6 - Finding Poles Find the poles of y=xx23x+2.Ch. 5.6 - Finding Poles Find the poles of y=x+1x2+7x.Ch. 5.6 - Horizontal Asymptotes Find all the horizontal...Ch. 5.6 - Horizontal Asymptotes Find all the horizontal...Ch. 5.CR - Reminder Round all answers to two decimal places...Ch. 5.CR - Reminder Round all answers to two decimal places...Ch. 5.CR - Reminder Round all answers to two decimal places...Ch. 5.CR - Prob. 4CRCh. 5.CR - Prob. 5CRCh. 5.CR - Prob. 6CRCh. 5.CR - Reminder Round all answers to two decimal places...Ch. 5.CR - Prob. 8CRCh. 5.CR - Prob. 9CRCh. 5.CR - Prob. 10CRCh. 5.CR - Reminder Round all answers to two decimal places...Ch. 5.CR - Prob. 12CRCh. 5.CR - Prob. 13CRCh. 5.CR - Prob. 14CRCh. 5.CR - Reminder Round all answers to two decimal places...Ch. 5.CR - Prob. 16CRCh. 5.CR - Reminder Round all answers to two decimal places...Ch. 5.CR - Reminder Round all answers to two decimal places...Ch. 5.CR - Reminder Round all answers to two decimal places...Ch. 5.CR - Prob. 20CRCh. 5.CR - Reminder Round all answers to two decimal places...Ch. 5.FR1 - Prob. 1ECh. 5.FR1 - Prob. 2ECh. 5.FR1 - Prob. 3ECh. 5.FR1 - Prob. 4ECh. 5.FR1 - Prob. 5ECh. 5.FR1 - Prob. 6ECh. 5.FR1 - Prob. 7ECh. 5.FR1 - Prob. 8ECh. 5.FR2 - Prob. 1ECh. 5.FR2 - Prob. 2ECh. 5.FR2 - Prob. 3ECh. 5.FR2 - Prob. 4ECh. 5.FR2 - Prob. 5ECh. 5.FR2 - Prob. 6ECh. 5.FR2 - Prob. 7ECh. 5.FR2 - Prob. 8ECh. 5.FR2 - Prob. 9ECh. 5.FR2 - Prob. 10ECh. 5.FR2 - Prob. 11ECh. 5.FR2 - Prob. 12ECh. 5.FR2 - Prob. 13ECh. 5.FR2 - Reminder Round all answers to two decimal places...Ch. 5.FR2 - Prob. 15E
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- Reminder Round all answers to two decimal places unless otherwise indicated. An Inappropriate Linear Model for Radioactive Decay This is a continuation of Exercise 14. Physicists have established that radioactive substances display constant percentage decay, and thus radioactive decay is appropriately modeled exponentially. This exercise is designed to show how using data without an understanding of the phenomenon that generated them can lead to inaccurate conclusions. a. Plot the data points from Exercise 14. Do they appear almost to fall on a straight line? b. Find the equation of the regression line and add its graph to the one you made in part a. c. If you used the regression line as a model for decay of 239U, how long would it take for the Initial 1 gram to decay to half that amount? Compare this with your answer to part d of Exercise 14. d. The linear model represented by the regression line makes an absurd prediction concerning the amount of uranium Uranium-239 remaining after 1 hour. What is this prediction? 14. The half life of 239U Uranium-239 is an unstable isotope of uranium that decays rapidly. In order to determine the rate of decay, 1 gram of 239U was placed in a container, and the amount remaining was measured at 1-minute intervals and recorded in the table below. Time, in minutes Grams remaining 0 1 1 0.971 2 0.943 3 0.916 4 0.889 5 0.863 a. Show that these are exponential data and find an exponential model For this problem, round all your answers to three decimal places. b. What is the percentage decay rate each minute? What does this number mean in practical terms? c. Use functional notation to express the amount remaining after 10 minutes and then calculate the value. d. What is the half life of 239U?arrow_forwardReminder Round all answers to two decimal places unless otherwise indicated. Male and Female High School Graduates The table below shows the percentage of male and female high school graduates who enrolled in college within 12 months of graduation. Years 1960 1965 1970 1975 Males 54 57.3 55.2 52.6 Females 37.9 45.3 48.5 49 a. Find the equation of the regression line for percentage of male high school graduates entering college as a function of time. b. Find the equation of the regression line for percentage of female high school graduates entering college as a function of time. c. Assume that the regression lines you found in part a and part b represent trends in the data. If the trends persisted, when would you expect first to have seen the same percentage of female and male graduates entering college? You may be interested to know that this actually occurred for the first time in 1980. The percentages fluctuated but remained very close during the 1981s and 1990s. In the 2000s, more female graduates entered college than did males. In 2008, for example, the rate for males was 66 compared with 72 for females.arrow_forwardRound all answers to two decimal places. Exponential Regression In Exercises S-7 through S-14 use exponential regression to fit the data set. Give the exponential model, and plot the data along with the model. x 4.2 7.9 10.8 15.5 20.2 y 7.5 8.1 8.5 10.2 12.3arrow_forward
- Reminder Round all answers to two decimal places unless otherwise indicated. Credit Card Payments You make one charge to a new credit card, but then charge nothing else and make the minimum payment each month. You can't find all of your statements, but the accompanying table shows, for those that you do have, your balance B in dollars, after you made n payments. Payment n 2 4 7 11 Balance B 478.73 440.74 389.33 329.99 a. Use regression to find an exponential for the data in the table. Round the decay factor to four decimal places. b. What was your initial charge? c. For such a payment scheme, the decay factor equals (1+r)(1m). Here r is the monthly finance charge as a decimal, and m is the minimum payment as a percentage of the new balance when expressed as a decimal. Assume that your minimum payment is 5, so m=0.05. Use the decay factor in your model to determine your monthly finance charge.arrow_forwardReminder Round all answers to two decimal places unless otherwise indicated. Logistic Formula A population grows according to the logistic model. N=251+0.5e1.4t where t is measured in years and N is measured in thousands. a. What is r for this population? b. What is the environmental carrying capacity K? c. This population is subject to harvesting. What is the optimum yield level?arrow_forwardReminder Round all answers to two decimal places unless otherwise indicated. Yellowfin Tuna Data were collected comparing the weight W, in pounds, of a yellowfin tuna to its length L, in centimeters. These data are presented in the following table. L=Length W=Weight 70 14.3 80 21.5 90 30.8 100 42.5 110 56.8 120 74.1 130 94.7 140 119 160 179 180 256 a. What is the average rate of change, in weight per centimeter of length, in going from a length of 100 centimeters to a length of 110 centimeters? b. What is the average rate of change, in weight per centimeter of length, in going from 160 to 180 centimeters? c. Judging from the data in the table, does an extra centimeter of length make more difference in weight for a small tuna or for a large tuna? d. Use the average rate of change to estimate the weight of a yellowtuna fish that is 167 centimeters long? e. What is the average rate of change, in length per pound of weight, in going from a weight of 179 pounds to a weight of 256 pounds? f. What would you expect to be the length of a yellow tuna weighing 225 pounds?arrow_forward
- Reminder Round all answers to two decimal places unless otherwise indicated. Defense SpendingData about recent federal defense spending are given in the accompanying Statistical Abstract of the United States table. Here t denotes the time, in years, since 1990 and D denotes federal defense spending, in billions of dollars. a.Calculate the average yearly rate of change in defense spending from 1990 to 1995. b.Use your answer from part a to estimate D(3), and explain what it means. t= Years since 1990 D= Spending billions of dollars 0 328.4 5 310.0 10 341.5 15 565.5 20 843.8 c.Calculate the average yearly rate of change in defense spending from 2005 to 2010. d.Use your answer form part c to estimate the value of D(22).arrow_forwardReminder Round all answers to two decimal places unless otherwise indicated. High School GraduatesThe following table shows the number, in millions, graduating from high school in the United States in the given year. Year Number 1975 3.13 1980 3.04 1985 2.68 1990 2.57 1994 2.46 1999 2.76 2004 3.05 2009 3.32 a.Make a plot of the data and explain why a linear model is not appropriate. b.Use regression to find a linear model for the years 1975 through 1990. In this part and the next. round regression line parameters to three decimal places. c.Use regression to find a linear model for the years 1994 through 2009. d.Write a formula for a model of the number, in millions, graduating as a piecewise-defined function using the linear models from part b and part c. e.Make a graph of the formula you found in part d. f.The number graduating in 1995 was 2.52million. On the basis of your graph in part e, determine how this compares with what would be expected from your formula.arrow_forwardReminder Round all answers to two decimal places unless otherwise indicated. Growth in Weight The following table gives, for a certain man, his weight W=W(t) in pounds at age t in years. t=Age(years) W=Weight pounds 4 36 8 54 12 81 16 128 20 156 24 163 a. Make a table showing, for each of the 4- year periods, the average yearly rate of change in W. b. Describe in general terms how the mans gain in weight varied over time. During which 4-year period did the man gain the most in weight? c. Estimate how much the man weighed at age 30. d. Use the average rate of change to estimate how much he weighed at birth. Is your answer reasonable?arrow_forward
- Reminder Round all answers to two decimal places unless otherwise indicated. Further Analysis of Population Growth This is a continuation of Exercise 3. Our goal is to make an exponential model or the data and use it to get a more accurate estimate of the rate of change in population in 1955. a. Use regression to obtain an exponential model for population growth. For details on the method used here, see Section 4.4. b. Use the formula you found in part a to get dNdt in 1955. c. How does your answer from part b of this exercise compare with your answer from part a of exercise 3? Does this agree with your answer in part c of Exercise 3? Population Growth The following table shows the population of reindeer on an island as of the given year. date 1945 1950 1955 1960 population 40 165 678 2793 We let t be the number of years since 1945, so that t=0 corresponds to 1945. and we let N=N(t) denote the population size. a. Approximate dNdt for 1955 using the average rate of change from 1955 to 1960, and explain what this number means in practical terms. b. Use your work from part a to estimate the population in 1957. c. The number you calculated in part a is an approximation to the actual rate of change. As you will be asked to show in the next exercise, the reindeer population growth can be closely modeled by an exponential function. With this in mind, du you think your answer in part a is too large or too small? Explain your reasoning.arrow_forwardSpecial Rounding Instructions When you perform logistic regression, round the r value to three decimal places and the other parameters to two decimal places. Round all answers to two decimal places unless other-wise indicated. Natural Gas Production The following table shows natural gas production N in trillions of cubic feet in the United states t years after 1940. t=yearssince1940 N=cubicft.intrilliions 0 3.75 10 8.48 20 15.09 30 23.79 40 21.87 50 21.52 60 24.15 a. Make a logistic model for N as a function of t. b. Graph the data and the logistic model. c. Which years production was farthest from the prediction of the logistic model? d. What does the logistic model predict for the amount of natural gas that will be produced in the long run? Note: In other contexts, this would be known as the carrying capacity..arrow_forwardReminder Round all answers to two decimal places unless otherwise indicated. Linear and Exponential DataOne of the following two tables shows linear data, and the other shows exponential data. Identify which is which, and find models for both. t f(t) t f(t) 0 6.70 3 10.46 1 7.77 4 12.13 2 9.02 5 14.07 Table A t g(t) t g(t) 0 5.80 3 10.99 1 7.53 4 12.72 2 9.26 5 14.45 Table Barrow_forward
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