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2 years ago

I need help on 23 please

Mathematics

1 answer:

Lena [83]2 years ago

8 0

Answer:

$\frac{27x^{15} }{8y^{12} }$

Step-by-step explanation:

I really wrote this out, so that you can see what is really happening.

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13 meters into yards <br> If you help me I will send upvotes

malfutka [58]

14 i think i am not exactly sure just estamating

5 0

4 years ago

Who calculated the volume of a sphere by comparing it to a cylinder? Pythagoras Euclid Archimedes Socrates

marusya05 [52]

Answer:

Archimedes

Step-by-step explanation:

The calculation of the volume of the sphere was one of the discoveries that Archimedes most esteemed of all the many he made in his life. He came to demonstrate in a very original way that the volume of the sphere is equal to two thirds of the volume of the circular cylinder circumscribed to it.

Archimedes departed from a semisphere of radius R and placed next to it a straight cone and a straight circular cylinder, both with radius base also R:

Next, he cut the three figures with a plane parallel to the base of the cylinder and studied how the sections that this plane would create in each of the figures would be:

Cylinder: circumference of radius R.

Semisphere: also a circle but of a different radius.

Cone: Also a circumference.

If for each slice you have the previous relationship it seems quite clear that the volumes follow the same relationship. Hence:

Cylinder volume = Semisphere volume + Cone volume

Archimedes knew the volumes of the cylinder and the cone, so:

$Semisphere\hspace{3}volume=Cone\hspace{3}volume-Cylinder\hspace{3}volume\\Semisphere\hspace{3}volume=\pi R^{3} -\frac{1}{3}\pi R^{3} =\frac{2}{3}\pi R^{3}$

Multiplying by 2 we obtain the volume of a sphere of radius R:

$Sphere\hspace{3}volume=\frac{4}{3}\pi R^{3}$

8 0

4 years ago

What is 20 divided by .35? or 35% of 20

Elanso [62]

35% of 20 would be 7
You can get 10% by dividing the number by 10.
As 10% is 2 multiplied by 3 is 6
5% is half of the 10% we have already found.
6 plus the 5% which is 1 equals 7

20 divided by .35 is 7.
When you want to divide by decimals you can turn them into whole numbers by multiplying as long as you divide them at the end.
0.35 x 100 equals 35
so if you were to do 20 x 35 which equals to 700 and divide it by 100, since we multiplied by 100, you would get an answer of 7.

8 0

4 years ago

Y=2x+8 Find y, if x is 2

Marysya12 [62]

First simplify the equation with the given information. 2(2) = 4, so the equation is now y = 4+8. Simplify further. 4+8 = 12, so y = 12.
Hope that helped you.

5 0

3 years ago

If Brianna spent $65 on necklaces and bracelets at a crafts fair.

marissa [1.9K]

Total = 65
65-23=42
42/3=14
Each necklace = $14

5 0

3 years ago