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3 years ago

Materials around us can be classified into:

Mathematics

1 answer:

Mazyrski [523]3 years ago

7 0

Answer:

A. Elements and Compounds

I think

Step-by-step explanation:

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557+678+78999997+875

bezimeni [28]

Answer:

557+678+78999997+875= 79002107

Step-by-step explanation:

Hope this helps

5 0

2 years ago

Read 2 more answers

PLEASE HELP MEHHHH! ITS IN MATHHH

Alex787 [66]

Answer:

Step-by-step explanation:

First page = 2 x 4.5 x 3 = 27 square feet.

Second page = 15 x 20 x 9 x 2 = 5400 cubic cmm

Third page = I'm sorry, I'm not really sure.

Fourth page = 52.5 cubic meters

Fifth page = I'm sorry, I'm not too sure...

Hope that helps!

3 0

2 years ago

Una máquina llena 4 baldes de helado en 30 minutos, funcionando siempre a la misma velocidad Si ante un corte de luz, solo funci

salantis [7]

Answer:

La máquina llenó:

6 baldes

Step-by-step explanation:

Por regla de tres:

4 baldes son a 30 minutos

M baldes son a 45 minutos

M = 45*4/30

M = 180/30

M = 6

6 0

3 years ago

Willing to give brainliest to whoever answer this first

kaheart [24]

Answer: 8. the square roots of perfect squares never be irrational numbers

9. repeating decimals will Always be rational numbers

10. irrational numbers will sometimes be written as fractions

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

All the edges of a regular square pyramid have length 8. find the Volume of the pyramid, Lateral area of the pyramid and the Tot

RUDIKE [14]

Answer:

V = 120.6796

LA = 110.8513

SA = 174.8513

Step-by-step explanation:

Let me know if you need more of an explanation for any of these

First we need the height, one way to find that out is to use the diagonal of the and one of the diagonal edges of the pyramid. Specifically we will need half of the diagonal of the square. We will call the diagonal of the square d.

$8^2+8^2=d^2\\d=\sqrt{64+64} \\d=\sqrt{128}$

Gonna leave it like that for ease of writing. So then half of the diagonal is $\frac{\sqrt{128}}{2}$

The height, h, will be $(\frac{d}{2})^2+h^2 = 8^2$ . Plugging everything in gets us $h=\sqrt{32}$

last, we need to find slant height, which we will call s.

$(\frac{8}{2})^2+h^2 = s^2\\s=\sqrt{48}$

s is also the height of the triangles for purposes of finding area. Now for the volume and areas.

Volume is area of the base times height divided by 3, so $V=8^2\frac{\sqrt{32} }{3} = \frac{64\sqrt{48} }{3} = 120.6796$

Lateral area is the sum of the four areas of the triangles, and each of those are $\frac{8*h}{2}$ so the whole lateral area is 4 times that. So we get $4\frac{8\sqrt{32} }{2} =110.8513$

Total surface area is the lateral surface area + the area of the base, so 110.8513 + 64 = 174.8513

6 0

3 years ago