#### Answer

$d = 2.091$

#### Work Step by Step

$7d^{5} + 20 = 300$
$7d^{5} = 300 - 20$
$7d^{5} = 280$
$d^{5} = 40$
$d = 40^{\frac{1}{5}}$
$d = 2.09127...$
$d = 2.091$

Published by
Brooks Cole

ISBN 10:
0-53449-636-9

ISBN 13:
978-0-53449-636-4

$d = 2.091$

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