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OlgaM077 [116]
3 years ago
15

Which expression can be used to solve 3/5 divide by 7/10

Mathematics
1 answer:
kramer3 years ago
7 0

Answer:

\frac{3}{5} *\frac{10}{7}  

=  \frac{30}{35} =\frac{6}{7}

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Give a 98% confidence interval for one population mean, given asample of 28 data points with sample mean 30.0 and sample standar
klio [65]

We have a sample of 28 data points. The sample mean is 30.0 and the sample standard deviation is 2.40. The confidence level required is 98%. Then, we calculate α by:

\begin{gathered} 1-\alpha=0.98 \\ \alpha=0.02 \end{gathered}

The confidence interval for the population mean, given the sample mean μ and the sample standard deviation σ, can be calculated as:

CI(\mu)=\lbrack x-Z_{1-\frac{\alpha}{2}}\cdot\frac{\sigma}{\sqrt[]{n}},x+Z_{1-\frac{\alpha}{2}}\cdot\frac{\sigma}{\sqrt[]{n}}\rbrack

Where n is the sample size, and Z is the z-score for 1 - α/2. Using the known values:

CI(\mu)=\lbrack30.0-Z_{0.99}\cdot\frac{2.40}{\sqrt[]{28}},30.0+Z_{0.99}\cdot\frac{2.40}{\sqrt[]{28}}\rbrack

Where (from tables):

Z_{0.99}=2.33

Finally, the interval at 98% confidence level is:

CI(\mu)=\lbrack28.94,31.06\rbrack

4 0
1 year ago
What is 12 more than 8.2 times a number n
pantera1 [17]
12 more than 8.2 times a number n is the same as “8.2n + 12”.
4 0
3 years ago
What is a signed number?
MrRa [10]
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5 0
3 years ago
Combine like terms: 3x^2+4y-2x^2-x^2
Marianna [84]

Answer: 4y

Step-by-step explanation:

3x^{2} + 4y - 2x^{2} -1x^{2}  To  

3x^2 - 2x^2 -1x^2 = 0  

0 +4y = 4y  

5 0
3 years ago
Please help question in the picture
Natalka [10]

Answer: use the Pythagorean theorem a2+b2=c2 substitute the numbers in

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Step-by-step explanation:

I showed on top

5 0
3 years ago
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