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seraphim [82]
3 years ago
15

Please help me 15 points and ill also give brainliest to correct answer

Mathematics
2 answers:
Akimi4 [234]3 years ago
8 0

Answer:

3:2

Step-by-step explanation:

ArbitrLikvidat [17]3 years ago
6 0

Answer:

C 9:4

Step-by-step explanation:

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The expression 50w+400 represents the amount of money Jenny has in her savings account after an unknown number of weeks. How muc
Sloan [31]

She originally had $400 in her bank account.

The 50w represents the amount she will put away each week.

3 0
3 years ago
A battery has a lifetime that is approximately normally distributed with a mean of 600 hours and a standard deviation of 50 hour
miss Akunina [59]

Answer:

A. Your battery is likely defective since such poor performance is extremely unlikely.

Step-by-step explanation:

When the distribution is normal, we use 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.

If X is more than two standard deviations from the mean, it is considered an unlikely outcome.

In this question, we have that:

\mu = 600, \sigma = 50

Which of the following conclusions is the most appropriate given this information?

Lasted 400 hours, so X = 400.

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

Z = \frac{400 - 600}{50}

Z = -4

4 standard deviations from the mean, so unlikely.

So the correct answer is:

A. Your battery is likely defective since such poor performance is extremely unlikely.

3 0
3 years ago
Point E has a positive y-coordinate.
Anna71 [15]

Answer: A

Quadrant II

5 0
3 years ago
What is the measure of this angle?<br> A) 44° <br> B) 56° <br> C) 136° <br> D) 144°
allsm [11]
A) 44 degrees just look at the degree the line segment lands on in the protractor
4 0
3 years ago
Read 2 more answers
Lisa made a shirt using 1/3 m of blue fabric and 3/5 m of red fabric how many meters of fabric did she use in all
Marysya12 [62]

Answer: 14/15 of a meter

Step-by-step explanation:

5 and 3 LCM is 15.

3/5 x 3 + 1/3 x 5= 9/15 + 5/ 15 = 14/15

5 0
3 years ago
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