Answer
$=4.2\times10^{4}$
Work Step by Step
$$(1.4\times10^{15})(3\times10^{-11})$$
Regroup like terms then simplify
$$=(1.4\times3)(10^{15}\times10^{-11})$$
$$=4.2\times10^{(15+(-11))}$$
$$=4.2\times10^{4}$$
College Algebra (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-32178-228-3
ISBN 13:
978-0-32178-228-1
Chapter P - Prerequisites: Fundamental Concepts of Algebra - Exercise Set P.2 - Page 33: 90
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