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2 years ago

PLSSSSS HURRY Brainliset involed

Mathematics

1 answer:

ExtremeBDS [4]2 years ago

4 0

Answer:

24.36m²

Step-by-step explanation:

area = ½×(8.9+2.7)×4.2= ½×48.72=24.36m²

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In monitoring lead in the air after the explosion at the battery factory, it is found that the amounts of lead over a 7 day peri

Andrew [12]

Answer:

$MOE=\pm \ 1.41$

Step-by-step explanation:

-Given that $\sigma=1.91, n=7$

-We determine the z-value corresponding to the 95% confidence level:

$z_{\alpha/2}=z_{0.025}=1.96$

-The margin of error is the degree of error from the real value and is calculated as follows:

$MOE=\pm z_{\alpha/2} (\frac{\sigma}{\sqrt{n}})\\\\=\pm z_{0.025}\times\frac{\sigma}{\sqrt{n}}\\\\=\pm 1.96\times \frac{1.91}{\sqrt{7}}\\\\=\pm 1.41$

Hence, the margin of error is $\pm 1.41$

7 0

3 years ago

Use the graph shown to fill in the blank.<br><br> When x = -3, then y = ?

Anni [7]

Answer:

-6

Step-by-step explanation:

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2 years ago

What domain, range, median, and mode?

omeli [17]

I don't know domain but range is the smallest number and largest number, median is the middle number when the numbers are ordered from least to greatest, and the mode is the most common or reoccuring variable in a set of numbers.

6 0

2 years ago

a) Read section 1.5 in the Yakir textbook. If you were a teacher and had 30 students in your class and wanted to know the class

OlgaM077 [116]

Answer:

Parameter

Step-by-step explanation:

Required

Parameter of Statistic

From the question, we understand that the teacher is to calculate the class average.

To calculate the class average, the teacher will use the mean function/formula, which is calculated as:

$Mean = \frac{\sum x}{n}$

Generally, mean is an example of a parameter.

<em>So, we can conclude that the teacher will use parameer</em>

7 0

2 years ago

Which is the inverse of this matrix? A. B. C. D. E. The matrix is noninvertible.

kvasek [131]

Answer:

-19 9 7

[15 -7 6 ]

-2 1 1

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers