#### Answer

$w = 18.5$ units

#### Work Step by Step

$w^{2} = (14)^{2} + (21)^{2} - 2(14)(21)cos(60)$
$w^{2} = 196 + 441 - 588cos(60)$
by GDC / calculator
$w^{2} = 637 - 294$
$w^{2} = 343$
$w = \sqrt {343}$
$w = 18.5202...$ units
$w = 18.5$ units

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Published by
Cengage

ISBN 10:
978-1-337-61408-5

ISBN 13:
978-1-33761-408-5

$w = 18.5$ units

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