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Yuliya22 [10]
3 years ago
7

What is the surface area of a cube that has a side length of 8 mm?

Mathematics
2 answers:
elena-14-01-66 [18.8K]3 years ago
8 0

Answer:

384 sq mm

Step-by-step explanation:

Formula : 3.84×10-4

nikklg [1K]3 years ago
6 0
Surface area of a cube = 6l²

Now given length = l = 8 mm

= 6*8² = 6*64 = 384 mm².

Thank you !!
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Which shape has a line of symmetry that can be drawn through the figure?
zimovet [89]

Answer: Option D.

Step-by-step explanation:

A figure has a line of symmetry if we can draw a line through the figure, in such way that the line cuts the figure in exactly two equal halves.

Then any figure that can be cutin exactly two halves, is a correct answer to this question.

Then:

For a circle, the line of symmetry is the diameter of the circle.

For the square, the line of symmetry can be obtained by cutting the square with a line that is perpendicular to one of the sides, and cuts that side exactly on the midpoint.

For an equilateral triangle, the line of symmetry is the line that cuts any base in the midpoint and also passes through the opposite vertex.

Then all the figures are correct options, then the correct option is D

7 0
3 years ago
Simplify the following completely, show all work.<br><br>4 + ✓-27​
V125BC [204]

Answer:

4+3i\sqrt{3}

Step-by-step explanation:

the \sqrt{-27} needs to be simplified

first, I broke it down to\sqrt{-1} and \sqrt{27}

\sqrt{-1} simplifies to i ;and  can be broken down to \sqrt{9} and \sqrt{3}

\sqrt{9} can be simplified further to 3

Now all you have to do is put it together

4(which you didnt have to do anything to)+ 3i( 3 from the sqrt of 9 and i from the sqrt of -1) sqrt 3( which cant be simplified further)

8 0
3 years ago
Please help me with the answer I keep getting it wrong
Vsevolod [243]
First because it's a broken line we know it's an inequality.

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slope is -2

so now we can take either points to find the equation by the formula

y-yo=m (x-xo) where m is slope

after substitution we can get

y-4=-2 (x-0)

y=-2x+4

3 0
3 years ago
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4vir4ik [10]

Answer:

Use a calculator its easier

Step-by-step explanation:

6 0
3 years ago
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KIM [24]

Answer:

anime is cool

Step-by-step explanation:

6 0
2 years ago
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