Intermediate Algebra (6th Edition)

Published by Pearson
ISBN 10: 0321785045
ISBN 13: 978-0-32178-504-6

Chapter 8 - Section 8.2 - Solving Quadratic Equations by the Quadratic Formula - Exercise Set - Page 495: 90a

Answer

432.378 micro grams

Work Step by Step

The amount of vitamins is modeled by: $y=.149x^2-4.475x+406.478$ We are first asked to consider a child who weights 25 pounds. To do this, plug 35 into the equation. Then, follow PEMDAS. In other words, first address parentheses, and then resolve exponents. Next, simplify division and multiplication, and lastly address subtraction and addition. 432.378 micro grams
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