Answer
$m^{4}n^{9}$
Work Step by Step
Using $a^x\cdot a^y=a^{x+y}$, then the given expression, $
(mn^5)(m^3n^4)
$, simplifies to
\begin{array}{l}\require{cancel}
m^{1+3}n^{5+4}
\\\\=
m^{4}n^{9}
.\end{array}
Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)
by Bittinger, Marvin L.; Ellenbogen, David J.; Johnson, Barbara L.
Published by
Pearson
ISBN 10:
0-32184-874-8
ISBN 13:
978-0-32184-874-1
Chapter 4 - Polynomials - 4.1 Exponents and Their Properties - 4.1 Exercise Set - Page 235: 31
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