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irina [24]
3 years ago
10

I need help #16 an 17

Mathematics
2 answers:
notka56 [123]3 years ago
8 0

Answer:

16. 12√5

17. 3 2/2 as it actually equal 4!

Romashka [77]3 years ago
7 0
Seventeen is :3 2/2
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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
3 years ago
Ms. Davenport bought a dozen packages of spaghetti sauce mix priced at 3 packages for $1.29. What is the price of one package of
larisa86 [58]

The answer is B) 0,43$, because 3*0,43 = 1,29

6 0
3 years ago
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An electrician charges a $100 flat fee, plus $75 per hour to work on a house.
jek_recluse [69]

Answer:

y=75x+100

Step-by-step explanation:

8 0
2 years ago
From which source can investors access accurate information about the market prices and movement of stocks?
Nadusha1986 [10]
A, financial newspapers.
8 0
3 years ago
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Please need help on this
ser-zykov [4K]

Answer: In my answer I got 9 because the formula to find the area it would be A=1/2b*h



Step-by-step explanation: How would you do this?

Well we know that the base equals 6 we have heighth so we would have to do 1.5*6 and that would give us 9 but if we round it would be 10 because 9 is closer to 10 than it is to 0.


thanks :)


4 0
3 years ago
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