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An incandescent bulb produces 520 lumens and has an efficacy of 13 lm/W.

What is the power of the bulb?

2.5 W
40 W
503 W
533 W

Respuesta :

AL2006

(520 lm) divided by (13 lm/W)

= (520 lm) times (W/13lm)

= (520/13) (lm · W / lm)

= 40 W

Answer:

40

Explanation:

just took the test

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