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seropon [69]
2 years ago
8

PLS HELP ME WITH THE QUESTION IN THE PHOTO

Mathematics
2 answers:
Colt1911 [192]2 years ago
8 0

Answer:

I think its C if not B

Step-by-step explanation:

disa [49]2 years ago
5 0

Answer:

The answer should be B

Step-by-step explanation:

The line shows equal to or grater than -20

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A large manufacturing plant uses lightbulbs with lifetimes that are normally distributed with a mean of 1200 hours and a standar
a_sh-v [17]

Answer:

The bulbs should be replaced each 1060.5 days.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 1200, \sigma = 60

How often should the bulbs be replaced so that no more than 1% burn out between replacement periods?

This is the first percentile, that is, the value of X when Z has a pvalue of 0.01. So X when Z = -2.325.

Z = \frac{X - \mu}{\sigma}

-2.325 = \frac{X - 1200}{60}

X - 1200 = -2.325*60

X = 1060.5

The bulbs should be replaced each 1060.5 days.

4 0
2 years ago
Need help, Write the equation of the line that passes through the points (-2, -3) and (8,3) first in point-slope form, and then
Allushta [10]

Answer:

the slope intercept formula would be: y=3/4x-3. Hope this helps!

Step-by-step explanation:

3 0
2 years ago
What are the 2 shapes
uysha [10]
A stop sign shape i think

6 0
3 years ago
Help please!!!!! ASAPPPP
r-ruslan [8.4K]

Answer:

the numerator is 31 and the bottom is 8

Step-by-step explanation:

5 0
2 years ago
PLEASE HELP I WILL GIVE BRAINLEST.
Korolek [52]

Answer:

The correct answer is 40

Step-by-step explanation:

I took the quiz

5 0
2 years ago
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