In some countries, normal household voltage is 220 volts. It is acceptable for the actual voltage x

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In some countries, normal household voltage is 220 volts. It is acceptable for the actual voltage x to differ from normal by at most 8 volts. A formula that describes this is

|x - 220| ≤ 8

(a) Show that a voltage of 214 volts is acceptable.
(b) Show that a voltage of 209 volts is not acceptable.

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Precalculus

ISBN: 978-0321716835

9th edition

Authors: Michael Sullivan

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Question Posted: Apr 06, 2019 07:23 AM

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In some countries, normal household voltage is 220 volts. It is acceptable for the actual voltage x

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Precalculus

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