College Algebra
7th Edition
ISBN: 9781305115545
Author: James Stewart, Lothar Redlin, Saleem Watson
Publisher: Cengage Learning
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Textbook Question
Chapter 4.6, Problem 25E
Law of Cooling These exercise use Newton’s Law of Cooling.
Cooling Soup A hot bowl or is served at a dinner party It Starts to according to Newton's Law Of Cooling, so its at time t is given by
where t is measured in minutes and T is measured in
(a) What is the initial temperature Of the soup?
(b) What is the after 10 min?
(e) After how long will the temperature IO(YF?
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College Algebra
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(a)...Ch. 4.3 - The natural logarithmic function f(x)=Inx has the...Ch. 4.3 - The natural logarithmic function f(x)= In (x1) has...Ch. 4.3 - Logarithmic and Exponential Forms Complete the...Ch. 4.3 - By finding the appropriate logarithmic or...Ch. 4.3 - Prob. 9ECh. 4.3 - Prob. 10ECh. 4.3 - Prob. 11ECh. 4.3 - Prob. 12ECh. 4.3 - Prob. 13ECh. 4.3 - Prob. 14ECh. 4.3 - Prob. 15ECh. 4.3 - Logarithmic From Express the equation in...Ch. 4.3 - Logarithmic From Express the equation in...Ch. 4.3 - Logarithmic Form Express the equation in...Ch. 4.3 - Prob. 19ECh. 4.3 - Prob. 20ECh. 4.3 - Prob. 21ECh. 4.3 - Prob. 22ECh. 4.3 - Prob. 23ECh. 4.3 - Prob. 24ECh. 4.3 - Prob. 25ECh. 4.3 - Prob. 26ECh. 4.3 - Prob. 27ECh. 4.3 - Prob. 28ECh. 4.3 - Prob. 29ECh. 4.3 - Prob. 30ECh. 4.3 - Prob. 31ECh. 4.3 - Prob. 32ECh. 4.3 - Prob. 33ECh. 4.3 - Prob. 34ECh. 4.3 - Logarithmic Equations Use the definition of the...Ch. 4.3 - Logarithmic Equations Use the definition of the...Ch. 4.3 - Logarithmic Equations Use the definition of the...Ch. 4.3 - Logarithmic Equations Use the definition of the...Ch. 4.3 - Logarithmic Equations Use the definition of the...Ch. 4.3 - Logarithmic Equations Use the definition of the...Ch. 4.3 - Logarithmic Equations Use the definition of the...Ch. 4.3 - Logarithmic Equations Use the definition of the...Ch. 4.3 - Logarithmic Equations Use the definition of the...Ch. 4.3 - Logarithmic Equations Use the definition of the...Ch. 4.3 - Evaluating Logarithms Use a calculate to evaluate...Ch. 4.3 - Evaluating Logarithms Use a calculate to evaluate...Ch. 4.3 - Evaluating Logarithms Use a calculate to evaluate...Ch. 4.3 - Evaluating Logarithms Use a calculator to evaluate...Ch. 4.3 - Graphing Logarithmic Function Sketch the graph of...Ch. 4.3 - Graphing Logarithmic Function Sketch the graph of...Ch. 4.3 - Graphing Logarithmic Function Sketch the graph of...Ch. 4.3 - Prob. 52ECh. 4.3 - Finding logarithmic Function Find the function of...Ch. 4.3 - Finding logarithmic Function Find the function of...Ch. 4.3 - Finding logarithmic Function Find the function of...Ch. 4.3 - Prob. 56ECh. 4.3 - Prob. 57ECh. 4.3 - Prob. 58ECh. 4.3 - Graphing Draw the graph of y=4x , then use it to...Ch. 4.3 - Graphing Draw the graph of y=3x , then use it to...Ch. 4.3 - Graphing Exponential Functions Graph the function,...Ch. 4.3 - Prob. 62ECh. 4.3 - Graphing Exponential Functions Graph the function,...Ch. 4.3 - Prob. 64ECh. 4.3 - Graphing Logarithmic Functions Graph the function,...Ch. 4.3 - Prob. 66ECh. 4.3 - Prob. 67ECh. 4.3 - Prob. 68ECh. 4.3 - Graphing Logarithmic Functions Graph the function,...Ch. 4.3 - Prob. 70ECh. 4.3 - Prob. 71ECh. 4.3 - Prob. 72ECh. 4.3 - Domain Find the domain of the function....Ch. 4.3 - Prob. 74ECh. 4.3 - Domain Find the domain of the function....Ch. 4.3 - Prob. 76ECh. 4.3 - Domain Find the domain of the function....Ch. 4.3 - Prob. 78ECh. 4.3 - Prob. 79ECh. 4.3 - Prob. 80ECh. 4.3 - Prob. 81ECh. 4.3 - Prob. 82ECh. 4.3 - Prob. 83ECh. 4.3 - Prob. 84ECh. 4.3 - Domain of a Composition Find the function fg and...Ch. 4.3 - Domain of a Composition Find the function fg and...Ch. 4.3 - Domain of a Composition Find the function fg and...Ch. 4.3 - Prob. 88ECh. 4.3 - Prob. 89ECh. 4.3 - Prob. 90ECh. 4.3 - Prob. 91ECh. 4.3 - Prob. 92ECh. 4.3 - Prob. 93ECh. 4.3 - Prob. 94ECh. 4.3 - Inverse Functions Find the inverse of the function...Ch. 4.3 - Prob. 96ECh. 4.3 - Prob. 97ECh. 4.3 - Prob. 98ECh. 4.3 - Prob. 99ECh. 4.3 - Charging a Battery The rate at which a battery...Ch. 4.3 - Prob. 101ECh. 4.3 - Prob. 102ECh. 4.3 - The Googolplex A googol is 10100 , and a...Ch. 4.3 - Comparing Logarithms Which is larger, log417 or...Ch. 4.3 - Prob. 105ECh. 4.4 - The logarithm of a product of two number is the...Ch. 4.4 - Prob. 2ECh. 4.4 - The logarithm of a number raised to a power is the...Ch. 4.4 - Prob. 4ECh. 4.4 - Prob. 5ECh. 4.4 - (a)Most calculators can find logarithms with...Ch. 4.4 - True or False? 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- Define Newton’s Law of Cooling. Then name at least three real-world situations where Newton’s Law of Cooling would be applied.arrow_forwardNewtons Law of Cooling Newtons law of cooling says that the rate at which a body cools is proportional to the difference in temperature between the body and an environment into which it is introduced. This leads to an equation where the temperature f(t) of the body at a time t after being introduced into an environment having constant temperature T0 is f(t)=T0+Cekt Where C and k are constants. Use this result in Exercises 2628. Find the temperature of an object when t=9,ifT0=18,C=5,andk=0.6.arrow_forwardNewtons Law of Cooling Newtons law of cooling says that the rate at which a body cools is proportional to the difference in temperature between the body and an environment into which it is introduced. This leads to an equation where the temperature f(t)of the body at time t after being introduced into an environment having constant temperature T0is f(t)=T0+Cekt, where C and k are constants. Use this result in Exercises 26 28. If C=100,k=0.1, and t is time in minutes, how long will it take a hot cup of coffee to cool to a temperature of 25C in a room at 20C?arrow_forward
- Frictional Force The frictional force F between the tires and the road required to keep a car on a curved section of a highway is directly proportional to the square of the speed s of the car. If the speed of the car is doubled, the force will change by what factor?arrow_forwardGlucose Concentration When glucose is infused into a persons bloodstream at a constant rate of c grams per minute, the glucose is converted and removed from the bloodstream at a rate proportional to the amount present. The amount of glucose in grams in the bloodstream at time t in minutes is given by gt=ca+g0-cae-at, where a is a positive constant. Assume g0=0.08, c=0.1, and a=13. a. At what time is the amount of glucose a maximum? What is the maximum amount of glucose in the bloodstream? b. When is the amount of glucose in the bloodstream 0.1 g? c. What happens to the amount of glucose in the bloodstream after a very long time? d. e.arrow_forwardVan der Waals Equation In Exercise 18 at the end of Section 2.3, we discussed the ideal gas law, which shows the relationship among volume V, pressure p, and temperature T for a fixed amount 1 mole of a gas. But chemists believe that in many situations, the van der Waals equation gives more accurate results. If we measure temperature T in kelvins, volume V in liters, and pressure p in atmosphere 1 atm is the pressure exerted by the atmosphere at sea level, then the relationship for carbon dioxide is given by p=0.082TV0.0433.592V2atm What volume does this equation predict for 1 mole of carbon dioxide at 500 kelvins and 100 atm?Suggestion: Consider volumes ranging from 0.1 to 1 liter.arrow_forward
- WaterWater flows into a tank, and a certain part of it drains out through a valve. The volume v in cubic feet of water in the tank at time t satisfies the equation dvdt=5(v/3). If the process continues for a long time, how much water will be in the tank?arrow_forwardDistance a. One car leaves a given point and travels north at 30 mph. Another car leaves the same point at the same time and travels west at 40 mph. At what rate is the distance between the two cars changing at the instant when the cars have traveled 2 hours? b. b. Suppose that. in part a. the second car left I hour later than the first car. At what rate is the distance between the two cars changing at the instant when the second car has traveled 1 hour?arrow_forwardBlood Pressure The rate of change of the volume V(t) of blood in the aorta at time t is given by V(t)=kP(t), where P(t) is the pressure in the aorta at time t and k is a constant that depends upon properties of the aorta. The pressure in the aorta is given by P(t)=P0emt, where P0 is the pressure at time t=0 and m is another constant. Letting V0 be the volume at time t=0, find a formula for V(t).arrow_forward
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