Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

Published by Pearson
ISBN 10: 0-32184-874-8
ISBN 13: 978-0-32184-874-1

Chapter 4 - Polynomials - 4.3 Polynomials - 4.3 Exercise Set - Page 253: 72


6.5 mcg/mL.

Work Step by Step

To solve this problem, we first draw the vertical line $x=4$. Next, we see where this line intersects the given curve. Finally, from this point, we draw a horizontal line to the y-axis to find the corresponding y value. Doing this, we find that the concentration is about 6.5 mcg/mL.
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