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irina1246 [14]
3 years ago
7

Primul numar este 60,al doilea numar este de 1,25 ori mai mare decit primul,iar al treilea reprezinta 40% din suma celor doua nu

mere.determinati media aritmetica a celor trei numere.
Mathematics
1 answer:
snow_tiger [21]3 years ago
7 0
I don't know what you said

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(15 PTS) Help me plz.
OlgaM077 [116]

Answer:

1.) C      2.) B         3.) B

Step-by-step explanation:

I had to do the same thing :)

8 0
3 years ago
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Assume that the population of human body temperatures has a mean of 98.6 degrees F and a standard deviation of 0.62 degrees F. I
dimulka [17.4K]

Answer:

0% probability of getting a mean temperature of 98.2 degrees F or lower.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, a large sample size can be approximated to a normal distribution with mean \mu and standard deviation \frac{\sigma}{\sqrt{n}}.

Normal probability distribution

Problems of normally distributed samples can be 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 = 98.6, \sigma = 0.62, n = 106, s = \frac{0.62}{\sqrt{106}} = 0.06

Find the probability of getting a mean temperature of 98.2 degrees F or lower.

This is the pvalue of Z when X = 98.2. So

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

Z = \frac{98.2 - 98.6}{0.06}

Z = -6.67

Z = -6.67 has a pvalue of 0.

So there is a 0% probability of getting a mean temperature of 98.2 degrees F or lower.

8 0
3 years ago
Find the area of a circle that has a radius of 9 mm. Use 3.14 for π.
melisa1 [442]

Answer: 254,34 mm².

Step-by-step explanation:

S{circle}=\pi R^2\\S{circle}=3,14*9^2\\S{circle}=3,14*81\\S{circle}=254,34\  mm^2.

7 0
2 years ago
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Will mark Brainlest ASAP
djyliett [7]

Answer:

Step-by-step explanation:

The lower value is 15,The upper value is 100, The median is 32 and 39, The lower quartile is 30, the upper quartile is 50, and the interquartile range is 36.

7 0
3 years ago
Simplify by dividing -5/8 and -3/4​
Orlov [11]

Answer:

Step-by-step explanation:

-5 -3 ×2 /8

-11/8

Hence the answer is,

-11/8

3 0
3 years ago
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