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1990
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1990
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d. How do you know (it is/they are) working?
Mark all that apply.

1[] Tested it/them
1[] It/they went off because of smoke
1[] It/they went off while cooking
1[] Changed the batteries
1[] The light is on
1[] Beeps when battery is low
1[] Other

e. Any other way?

[] Yes (Reask 8d and e)
[] No