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natka813 [3]
3 years ago
12

Solving equations with rational numbers

Mathematics
1 answer:
shusha [124]3 years ago
8 0
What is your question this makes no sense
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Statements that are true for a cylinder with radius r and height h.
vampirchik [111]

Answer:

Only the second and third statements are correct:

Doubling <em>r</em> quadruples the volume.

Doubling <em>h</em> doubles the volume.

Step-by-step explanation:

The volume of a cylinder is given by:

\displaystyle V=\pi r^2h

We can go through each statement and examine its validity.

Statement 1)

If the radius is doubled, our new radius is now 2<em>r</em>. Hence, our volume is:

\displaystyle V=\pi (2r)^2h=4\pi r^2h

So, compared to the old volume, the new volume is quadrupled the original volume.

Statement 1 is not correct.

Statement 2)

Using the previous reasonsing, Statement 2 is correct.

Statement 3)

If the height is doubled, our new height is now 2<em>h</em>. Hence, our volume is:

V=\pi r^2(2h)=2\pi r^2h

So, compared to the old volume, the new volume has been doubled.

Statement 3 is correct.

Statement 4)

Statement 4 is not correct using the previous reasonsing.

Statement 5)

Doubling the radius results in 2<em>r</em> and doubling the height results in 2<em>h</em>. Hence, the new volume is:

V=\pi (2r)^2(2h)=\pi (4r^2)(2h)=8\pi r^2h

So, compared to the old volume, the new volume is increased by eight-fold.

Statement 5 is not correct.

7 0
3 years ago
The volume of the rectangular solid below is 1,440 cubic inches. What could be the length and width of this rectangular solid?
Rudik [331]

C. 8 inches by 20 inches

5 0
3 years ago
Miko filled two tanks with water. The ratio of the amount of water in Tank A to Tank B is 3 : 2. The total amount of water in bo
Anna71 [15]

Step-by-step explanation:

answer is in the above picture

6 0
2 years ago
Im giving brainliest
Alla [95]

Answer:

80 is the measure because if aob is 40 then doe is 40 and  dof  is 120 minus the doe that  40 then you are going to get the mesuare which is 80

8 0
3 years ago
Read 2 more answers
How many virtical angles are there?<br><br><br> a)m 4<br><br> b) 8<br><br> c) 11<br><br> d) 14
lara31 [8.8K]
A) 4

∠14 & ∠12
∠11 & ∠13
∠10 & ∠8
∠7 & ∠9

vertical angles are angles directly opposite of each other and are of the same measurement.

hope this helps
5 0
3 years ago
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