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1 year ago

Find the surface area of this cube 7m 7m 7m. Be sure to include the correct unit in your answer.

Mathematics

1 answer:

7nadin3 [17]1 year ago

4 0

Answer:

294 $m^2$

Step-by-step explanation:

The area of one face of the cube would be 7 x 7 = 49 $m^2$

Since there are 6 faces on a cube, the total surface area would therefore be 49 x 6 = $294m^2$

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Let 3.27<<5.89 represent an interval on the number line. Find the value that is in the middle of the interval.

laila [671]

Answer:

The middle value of the interval is 4.58

Step-by-step explanation:

Consider the provided interval.

We need to find the value that is in the middle of the interval.

We can find the middle value of the interval by adding the upper and lower limit and divide the sum of the upper and lower limits by 2.

Here the upper limit is 3.27 and lower limit is 5.89.

$\frac{3.27+5.89}{2}=\frac{9.16}{2}=4.58$

Hence, the middle value of the interval is 4.58

4 0

3 years ago

Ten samples of coal from a northern appalachian source had an average mercury content of 0.242 ppm with a standard deviation of

Dovator [93]

The confidence interval is from 0.2191 to 0.2649, given by

$0.242\pm0.0229$ .

The z-score we need is found by first subtracting the confidence level from 1:
1 - 0.95 = 0.05

Divide that by 2:
0.05/2 = 0.025

Subtract that from 1:
1 - 0.025 = 0.975

Look this up in the middle of a z-table (http://www.z-table.com) and we see that the z-score is 1.96.

Now our confidence interval is given by
$\overline{x} \pm z\times \frac{\sigma}{\sqrt{n}}
\\
\\0.242\pm 1.96 \times (\frac{0.037}{\sqrt{10}})
\\
\\0.242 \pm .0229
\\
\\0.242-0.0229=0.2191
\\
\\0.242+0.0229 = 0.2649$

5 0

3 years ago

∆ABC is translated 6 units up and 3 units left to create ∆A'B'C'.

guapka [62]

The correct answer is 1

4 0

2 years ago

On Saturday, many tickets fir a hockey game were sold. Children and adult were in the ratio of 4:7. There are 88 tickets in tota

ollegr [7]

Answer:

<em>56 adult tickets were sold</em>

Step-by-step explanation:

Ratio of ticket sold to Children and adult is in the ratio 4 : 7

Total ratio = 4 +7 = 11

Ratio of adult = 7

Total ticket sold = 88

Number of adult tickets sold = Ratio of adult/Total ratio * Total ticket sold

Number of adult tickets sold = 7/11 * 88

Number of adult tickets sold = 7 * 8

Number of adult tickets sold = 56 tickets

<em>Hence 56 adult tickets were sold</em>

3 0

2 years ago

I need help finding the slope

Scilla [17]

Answer:

The answer is ✰ 4 ✰

Step-by-step explanation:

:))

8 0

2 years ago