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Helen [10]
2 years ago
7

65 trees in town park..38 are apple. How many oak

Mathematics
1 answer:
ch4aika [34]2 years ago
6 0

Answer:

27 oak trees

Step-by-step explanation:

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gladu [14]

Answer:

i think the answer is B. S corresponds to V

Step-by-step explanation:

because it is

3 0
3 years ago
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What is the y coordinate of the point where a graph crosses the y axis called ?
UNO [17]

Answer:

y-interspet  i think

Step-by-step explanation:

8 0
3 years ago
Calculate the length of the hypotenuse
alexira [117]

Answer:

8.60

Step-by-step explanation:

A^2+B^2=C^2

5*5=25    7*7=49    49+25= 74

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8 0
3 years ago
The Environmental Protection Agency (EPA) publishes fuel economy values that are known to be good estimates of the fuel economy
r-ruslan [8.4K]

Answer:

The 90% confidence interval for the mean combined fuel economy for Ford Explorers is between 22.95 and 23.63 mpg.

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 = 16 - 1 = 15

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 15 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.9}{2} = 0.95. So we have T = 1.7531

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 1.7531\frac{0.78}{\sqrt{16}} = 0.34

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 23.29 - 0.34 = 22.95 mpg

The upper end of the interval is the sample mean added to M. So it is 23.29 + 0.34 = 23.63 mpg

The 90% confidence interval for the mean combined fuel economy for Ford Explorers is between 22.95 and 23.63 mpg.

7 0
2 years ago
Help thank u so much thanks
Jlenok [28]

7.5, 7.058, 8.508,

8.58

Step-by-step explanation:

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2 years ago
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