   Chapter 6, Problem 49AT ### Contemporary Mathematics for Busin...

8th Edition
Robert Brechner + 1 other
ISBN: 9781305585447

#### Solutions

Chapter
Section ### Contemporary Mathematics for Busin...

8th Edition
Robert Brechner + 1 other
ISBN: 9781305585447
Textbook Problem

# Use the chart “The Rise of E-Books in Education” for Exercises 47-49.If the 2013 figure represents a 19.6 % increase from 2012, what are the projected education e-book sales for 2012? Round to the nearest tenth of a million. To determine

To calculate: The amount of projected education e-book sales for year 2012 and also round it to nearest tenth of a million, such that in the figure year 2013 represents an increase of 19.6% from year 2012. Explanation

Given Information:

There is a chart is given as,

Formula used:

Step1: Put the new amount for the portion in the formula Base=PortionRate.

Step2: If the rate of change is an increase then add that given rate with 100% to get the rate.

Step3: Solve the equation for the base by putting the obtained values in the formula.

Calculation:

Consider the given chart.

From the chart sales of digital textbooks for higher education in 2013 was $275.0 million. Here value of portion is P=$275.0 million as portion is the new amount.

As the rate of change is an increase hence add 19.6% rate to 100% as,

R=(100%+19.6%) =119.6%

Hence rate is R=119.6%.

Here the amount of projected education e-book sales for year 2012 is unknown hence base is missing

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