College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter P - Prerequisites: Fundamental Concepts of Algebra - Mid-Chapter Check Point - Page 63: 30


$2.15$ x $10^{20}$

Work Step by Step

Human brain: $3$ x $10^{10}$ neurons Gorilla brain: $7.5$ x $10^{9}$ neurons Combine the coefficients and exponents. Then add $1$ to the exponent since scientific notation will put the decimal point one more place to the left. $3$ x $10^{10}$ x $7.5$ x $10^9$ $21.5$ x $10^{19}$ $2.15$ x $10^{20}$
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