The lighting department of a city has installed 2000 electric lamps with an average life of 1000 hrs and a standard deviation of 200 hrs. (10 points) a. after what period of lighting hours would we expect 10% of the lamps to fail? b. how many lamps may be expected to fail between 900 and 1300 hrs?

yes

step-by-step explanation:

c: y > - 1/6x + 1

step-by-step explanation:

dashed line - meaning this < or > also not equal

solid line - meaning this < or > also equal

your answer is c because y > means up & it's shaded up, but y < means down

hope this ! : )

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step-by-step explanation: