Calculus Concepts: An Informal Approach to the Mathematics of Change 5th Edition

Published by Brooks Cole
ISBN 10: 1-43904-957-2
ISBN 13: 978-1-43904-957-0

Chapter 1 - Ingredients of Change: Functions and Limits - 1.1 Activities - Page 11: 36

Answer

(a) 2 groups donated at least $5,000,000$ dollars to the Disaster Relief Fund in 2005. (b) $d(1)=15$

Work Step by Step

(a) In this case $x=5$ and $d(x)=2$ therefore a sentence of interpretation is: 2 groups donated at least $5,000,000$ dollars to the Disaster Relief Fund in 2005. (b) Here, fifteen groups donated at least 1 million dollars. If we want to translate it to the function, $x$ represents the million dollars at least donated by the groups, therefore $x=1$ $d(x)$ represents the number of groups, therefore $d(x)=15$. $d(1)=15$
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