Answer
$1.6$ astronomical units
Work Step by Step
Substituting $n=4$ into the formula,
$d_{4}=0.3(2^{4-2})+0.4=0.3(4)+0.4$
= $1.6$ astronomical units
Algebra 2 (1st Edition)
by Larson, Ron; Boswell, Laurie; Kanold, Timothy D.; Stiff, Lee
Published by
McDougal Littell
ISBN 10:
0618595414
ISBN 13:
978-0-61859-541-9
Chapter 12 Sequences and Series - 12.1 Define and Use Sequences and Series - 12.1 Exercises - Problem Solving - Page 800: 66a
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