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VMariaS [17]
3 years ago
8

the width of a rectangle is 9m less than it's legnth if the perimeter of the rectangle is 54m find the legnth of the garden​

Mathematics
1 answer:
Nata [24]3 years ago
4 0

Perimeter of rectangle = 2(l+w)

So, 54cm = 2(l+9cm)

=> 54cm = 2l + 18cm

=> 54cm - 18cm = 2l

=> 36cm = 2l

=> 36cm/2 = l

=> 18cm = l

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Sonja [21]

Answer:

<u>The proportion of the scores that are on the right side of the line is  0.0668</u>

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

µ of a normal distribution = 40

σ of a normal distribution = 10

X = 55

2. What proportion of the scores are on the right side of the line?

Let's calculate the z-score for X = 55, this way:

z-score = (X - µ)/σ

z-score = (55 - 40)/10

z-score = 1.5

Now, using the z-table, let's calculate the proportion, this way:

p (z = 1.5) = 0.9332

In consequence,

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4 years ago
What is the energy flow of a existing Rock to Sediment?
Vlada [557]

Answer:

Sedimentary rocks are formed from pieces of other existing rock or organic material. There are three different types of sedimentary rocks: clastic, organic , and chemical. Clastic sedimentary rocks, like sandstone, form from clasts, or pieces of other rock.

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3 years ago
You want to construct a 92% confidence interval. The correct z* to use is
Vaselesa [24]

Answer:

1) The correct z* to to construct a 92% confidence interval is 1.75

2) these results are not good evidence that the new curriculum has improved Math SAT scores.

3) the results are not statistically significant at level α = 0.05, but they are practically significant.

Step-by-step explanation:

1) z-score for 92% confidence level is ≈ 1.75

2) P-value for testing whether the mean score in senator's state is more than the national average of 480 is less than 0.0001 means that

the probability that the sample is drawn from the population where senator's state is more than the national average of 480 is <0.0001.

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3) if we calculate the statistic of the sample we get (560-480)/100=0.8 where

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But 80 points higher than the national average is a practically significant result since its <em>effect size</em> is large.

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mafiozo [28]
40 is the correct answer

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