Answer: 68% of light bulbs last between 1765 hours and 1835 hours.
Step-by-step explanation:
The empirical rule states that for a normal distribution, nearly all of the data will fall within three standard deviations of the mean . The empirical rule is further illustrated below
68% of data falls within the first standard deviation from the mean.
95% fall within two standard deviations.
99.7% fall within three standard deviations.
From the information given, the mean is 1800 hours and the standard deviation is 35 hours.
1 standard deviation = 1 × 35 = 35
1800 - 35 = 1765 hours
1800 + 35 = 1835 hours
Therefore, 68% of light bulbs last between 1765 hours and 1835 hours.
Answer:
2 2/4 - 1 1/4 = 1 1/4
Step-by-step explanation:
Hope this helps!
if not I am sorry
Answer:
The Indus River Valley Civiization.
Step-by-step explanation:
https://www.history.com/topics/ancient-middle-east/persian-empire#section_1
Answer:
What do you need to answer, you never said
Step-by-step explanation:
<span>3a4y3 − 12a3y2 + 6a2y
=3a^2y (a^2y^2 - 4ay + 2)
answer is </span>3a^2y (a^2y^2 - 4ay + 2) (second choice)
