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Calculus: Early Transcendental Fun...

7th Edition
Ron Larson + 1 other
Publisher: Cengage Learning
ISBN: 9781337552516

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BuyFindarrow_forward

Calculus: Early Transcendental Fun...

7th Edition
Ron Larson + 1 other
Publisher: Cengage Learning
ISBN: 9781337552516
Chapter 6.3, Problem 55E
Textbook Problem
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Advertising Awareness In Exercises 55 and 56, use the advertising awareness model described in Example 6 to find the number of people y(in millions) aware of the product as a function of time t(in years).

y = 0 when t = 0 ; y = 0.75 when t = 1

To determine

To calculate: The number of people y (in millions) aware of the product at time t (in years) with the use of advertising model dydt=k(1y).

Explanation of Solution

Given:

The initial conditions as, y=0 when t=0 and y=0.75 when t=1.

Formula used:

The integral of, f(x)f(x)dx=lnf(x)+c.

The logarithmic property of elnx=x.

Calculation:

Consider the modeling advertising awareness equation as:

dydt=k(1y)

Now use separation of variables method which is of form f(y)dy=g(x)dx.

dy1y=kdt

Now, integrate to obtain,

dy1y=kdtdy1y=kdtln|1y|=kt+c1ln|1y|=ktc1

Further calculate and assume y<1

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Chapter 6 Solutions

Calculus: Early Transcendental Functions
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Solving a Differential Equation In Exercises...Ch. 6 - Solving a Differential Equation In Exercises...Ch. 6 - Solving a Differential Equation In Exercises...Ch. 6 - Solving a Differential Equation In Exercises...Ch. 6 - Solving a Differential Equation In Exercises...Ch. 6 - Solving a Differential Equation In Exercises...Ch. 6 - Writing and Solving a Differential Equation In...Ch. 6 - Writing and Solving a Differential Equation In...Ch. 6 - Finding an Exponential Function In Exercises...Ch. 6 - Finding an Exponential Function In Exercises...Ch. 6 - Finding an Exponential Function In Exercises...Ch. 6 - Finding an Exponential Function In Exercises...Ch. 6 - Air Pressure Under ideal conditions, air pressure...Ch. 6 - Radioactive Decay Radioactive radium has a...Ch. 6 - Population A population grows exponentially at a...Ch. 6 - Compound Interest Find the balance in an account...Ch. 6 - Sales The sales S (in thousands of units) of a new...Ch. 6 - Sales The sales 5 (in thousands of units) of a new...Ch. 6 - Finding a General Solution Using Separation of...Ch. 6 - Finding a General Solution Using Separation of...Ch. 6 - Finding a General Solution Using Separation of...Ch. 6 - Finding a General Solution Using Separation of...Ch. 6 - Finding a Particular Solution Using Separation of...Ch. 6 - Finding a Particular Solution Using Separation of...Ch. 6 - Finding a Particular Solution Using Separation of...Ch. 6 - Finding a Particular Solution Using Separation of...Ch. 6 - Slope Field In Exercises 43 and 44, sketch a few...Ch. 6 - Slope Field In Exercises 43 and 44, sketch a few...Ch. 6 - Finding a Particular Solution Curve In Exercises...Ch. 6 - Finding a Particular Solution Curve In Exercises...Ch. 6 - Finding Orthogonal Trajectories In Exercises 47...Ch. 6 - Finding Orthogonal Trajectories In Exercises 47...Ch. 6 - Using a Logistic Equation In Exercises 49 and 50,...Ch. 6 - Using a Logistic Equation In Exercises 49 and 50,...Ch. 6 - Solving a Logistic Differential Equation In...Ch. 6 - Solving a Logistic Differential Equation In...Ch. 6 - Wildlife Population The rate of change of the...Ch. 6 - Environment A conservation department releases...Ch. 6 - Sales Growth The rate of change in sales 5 (in...Ch. 6 - Sales Growth Use the result of Exercise 55 to...Ch. 6 - Learning Theory In Exercises 57 and 58, assume...Ch. 6 - Learning Theory In Exercises 57 and 58, assume...Ch. 6 - Solving a First-Order Linear Differential Equation...Ch. 6 - Solving a First-Order Linear Differential Equation...Ch. 6 - Solving a First-Order Linear Differential Equation...Ch. 6 - Solving a First-Order Linear Differential Equation...Ch. 6 - Solving a First-Order Linear Differential Equation...Ch. 6 - Solving a First-Order Linear Differential Equation...Ch. 6 - Solving a First-Order Linear Differential Equation...Ch. 6 - Solving a First-Order Linear Differential Equation...Ch. 6 - Slope Field In Exercises 67-70, (a) sketch an...Ch. 6 - Slope Field In Exercises 67-70, (a) sketch an...Ch. 6 - Slope Field In Exercises 67-70, (a) sketch an...Ch. 6 - Slope Field In Exercises 67-70, (a) sketch an...Ch. 6 - Finding a Particular Solution In Exercises 71-74,...Ch. 6 - Finding a Particular Solution In Exercises 71-74,...Ch. 6 - Finding a Particular Solution In Exercises 71-74,...Ch. 6 - Finding a Particular Solution In Exercises 71-74,...Ch. 6 - Investment Let A(t) be the amount in a fund...Ch. 6 - Investment A retired couple plans to withdraw P...Ch. 6 - Falling Object A 12-pound object is dropped from...Ch. 6 - Mixture A tank contains 100 gallons of a solution...Ch. 6 - Analyzing Predator-Prey Equations In Exercises 79...Ch. 6 - Analyzing Predator-Prey Equations In Exercises 79...Ch. 6 - Analyzing Competing-Species Equations In Exercises...Ch. 6 - Analyzing Competing-Species Equations In Exercises...Ch. 6 - Doomsday Equation The differential equation where...Ch. 6 - Sales Let S represent sales of a new product (in...Ch. 6 - Error Using the Product Rule Although it is true...Ch. 6 - Torricellis Law Torricellis Law states that water...Ch. 6 - Torricelli's Law The cylindrical water tank shown...Ch. 6 - Torricelli's Law A tank similar to the one in...Ch. 6 - Rewriting the Logistic Equation Show that the...Ch. 6 - Biomass Biomass is a measure of the amount of...Ch. 6 - Finding a Function Consider a function f such that...Ch. 6 - If the tracer is injected instantaneously at time...Ch. 6 - Use the solution of the differential equation in...Ch. 6 - In Exercises 11 and 12, it was assumed that there...

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