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goldenfox [79]
3 years ago
15

Please help I’ll give brainliest

Mathematics
2 answers:
ziro4ka [17]3 years ago
7 0

Answer:

25 chords

Step-by-step explanation:

First, set up the ratio 40:8.

Now, make a proportion.

\frac{40}{8}=\frac{x}{5}

This proportion will give you x=25, so your answer is 25.

Hope this helps! Have a great day! :)

Vsevolod [243]3 years ago
5 0

Answer:

she will play 31 chords

Step-by-step explanation:

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sukhopar [10]

Answer:

From the result of the one-tailed z-test, we can conclude that the mean waiting time is not significantly less than the the 15 minute claim by the taxpayer advocate.

Step-by-step explanation:

Sample size = 50

Mean waiting time = 13 minutes

Standard deviation = 11 minutes

We need to perform one hypothesis test that the actual mean waiting time turned out to be significantly less than the 15-minute claim made by the taxpayer advocate.

The null hypothesis would be that there is no significant difference.

H₀: μ₀ = 15 minutes

The alternative hypothesis would be that the mean waiting time is indeed significantly less than the 15-minute claim by the taxpayer advocate.

Hₐ: μ₀ < 15 minutes.

This is evidently a one tail hypothesis test (we're investigating only in one direction; less than the claim). Hence, we can use the z-test

z = (x - μ)/σₓ

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Using the z-table at significance level of 0.05.

p-value = 1 - 0.9115 (from the z-tables)

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Since the p-value is more than the significance level (0.0885 > 0.05), we do not reject the null hypothesis.

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4 0
3 years ago
To the nearest degree, what is the measure of the central angle for faucets? 37° 24° 48° 43°
Masteriza [31]

Answer:

\large\boxed{43^o}

Step-by-step explanation:

\text{Faucets}\to12\%\\\\p\%=\dfrac{p}{100}\to12\%=\dfrac{12}{100}=0.12\\\\12\%\ \text{of}\ 360^o\to0.12\cdot360^o=43.2^o\approx43^o

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3 years ago
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