Finite Math and Applied Calculus (6th Edition)

Published by Brooks Cole
ISBN 10: 1133607705
ISBN 13: 978-1-13360-770-0

Chapter 14 - Section 14.2 - Area between Two Curves and Applications - Exercises - Page 1030: 2

Answer

$\dfrac{20}{3}$

Work Step by Step

Here, the area can be expressed as: $A=\int_0^{2}[0-(x^3-4x^2)] \ dx=\int_0^{2} (4x^2-x^3) \ dx$ In order to solve the above integral, we will use the following formula such as: $\int x^n \ dx=\dfrac{x^{n+1}}{n+1}+C$ Now, we have $\int_0^{2} (4x^2-x^3) \ dx=[\dfrac{4x^3}{3}-\dfrac{x^4}{4}]_0^2$ or, $=[\dfrac{4(2)^3}{3}-\dfrac{(2)^4}{4}]-[\dfrac{4(0)^3}{3}-\dfrac{(0)^4}{4}]$ or, $=\dfrac{32}{3}-4$ Therefore, the required area is: $Area=\dfrac{20}{3}$
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