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Karo-lina-s [1.5K]
3 years ago
13

Which statement correctly describes how to find an equivalent fraction for 60

Mathematics
1 answer:
Dahasolnce [82]3 years ago
3 0

Answer:

C and E

Step-by-step explanation:

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The average natural gas bill for a random sample of 21 homes in the 19808 zip code during the month of February was $311.90 with
Serhud [2]

Answer:

The 90% confidence interval for the true mean natural gas bill for homes in the 19808 zip code area in February is between $292.48 and $331.32

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 21 - 1 = 20

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 20 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.9}{2} = 0.95. So we have T = 1.7247

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 1.7247\frac{51.60}{\sqrt{21}} = 19.42

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 311.9 - 19.42 = $292.48

The upper end of the interval is the sample mean added to M. So it is 311.9 + 19.42 = $331.32

The 90% confidence interval for the true mean natural gas bill for homes in the 19808 zip code area in February is between $292.48 and $331.32

3 0
2 years ago
Evaluate the logarithm.
eimsori [14]

Answer:

x \approx 0.954

Step-by-step explanation:

The logarithm is evaluated as follows:

x = 2\cdot \log 3

x = \log 3^{2}

x = \log 9

The value of the logarithm can be estimated by means numeric methods, which can be easily used on calculators (i.e. Macaulay Series)

x \approx 0.954

8 0
3 years ago
Identify the vertex of the graph. Tell whether it is a minimum or maximum.
shtirl [24]
The answer to your question is letter “D”
3 0
3 years ago
Read 2 more answers
Please need help please ,
Natali5045456 [20]

Answer:

your m0m

Step-by-step explanation:

because i said 88

8 0
2 years ago
Which best describes the meaning of the statement if A then B
Oliga [24]

Answer:

a => b   \equiv   ( \neg a   \ \lor   \ b )

Step-by-step explanation:

You can understand the statement from many perspectives, but in terms of proposition logic it is best to understand it as   "negation of a" or "  b" in mathematical terms is written like this

a => b   \equiv   ( \neg a   \ \lor   \ b )

You can show that they are logically equivalent because they have the same truth table.

 

3 0
3 years ago
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