Question

can someone do math with me?

Answer 1

Do you have a specific question ? :)

Answer 2

Yeah, they starting to put equations in volume and i was already at a lost without equations in the mix

Answer 3

If the sphere shown above has a radius of 18 units, then what is the volume of the sphere? 7,776 cubic units 9,720 cubic units 1,296 cubic units 3,888 cubic units

Answer 4

.

Answer 5

sorry, but you'll need to be a LOT more specific in sharing the question you're addressing here, as well as in specifying what kind of help you need. "They started to put equations in volume" is definitely not clear enough to convey to someone else what you're asking!

Answer 6

Oh ok thanks for the advice mathmale.

Answer 7

So, what is it that you're trying to do? What have you done so far? What kind of help do you need? Can you share your work with the rest of us, please?

Answer 8

Well I can do somewhat of volume by myself but I'm not good with equations nor volume and now they are in the same math problem but i can't tell the diffrence so i use the formula I'm use to

Answer 9

The math I'm doing doesn't tell you that you have to deal with equations too and since i can't notice them a I work the math problems I just guess and luck is never on my side.

Answer 10

I already posted the question so if someone could work me through the formula so I could do it by myself in the future that would be great.

Answer 11

@bluescar: As I see it, your primary difficulty here lies in communicating to others what you're doing and what kind of help you need to proceed. Why shoot yourself in the foot sharing "I'm not good with equations?" such a negative self-concept won't help you.

Please (really, please) go back to the problem you're trying to solve and share it (directions, sketches and all) with the rest of us.

OK: I see that your 3rd post was the actual problem statement: "If the sphere shown above has a radius of 18 units, then what is the volume of the sphere?"

You are telling me that the radius of the sphere is 18 units.

Great.

What is the standard, basic formula for the volume of a sphere whose radius is r?

If you don't know that, please do an Internet search for "volume of a sphere" and report here on your findings. What is the radius of a sphere whose radius is r?

Answer 12

post all of it I found?

Answer 13

well he left.

Answer 14

Whether I left or not is rather immaterial. I asked you to look up the specific formula for the volume of a sphere of radius r, gave you time in which to do so, and am still waiting for you to do so. Post that formula and nothing more, certainly not all of your search results, please.

The volume of a sphere of radius r is ... ?

Answer 15

There are certain basic shapes in geometry for which you'll need to learn the names and the formulas for volume: sphere, cylinder, rectangular prism, and so on. Please consider doing that and saving your results for later reference.

Answer 16

Ok I'll keep searching till i find it I'm searching what you told me to.

Answer 17

V=4
3πr3

Answer 18

v= 4/3πr^3

Answer 19

Google "volume of a sphere" now, please. The volume formula will appear right in front of you. Please type that as

V= (4/3) pi r^3, or (better yet)\[V _{sphere}=\frac{ 4 }{ 3 }\pi r^3\]

Answer 20

What is the given radius of the sphere whose volume you're supposed to calculate?

Answer 21

r = ?

What is the cube of that (that is, what is r^3 in this specific case?) ?

Answer 22

The question timed out so I'll show you a new one and give it to you.

Answer 23

Also comment on what you have thought and done towards solving the new problem. Remember, I'm here to guide you along the path to your own solution.

Answer 24

Ok

Answer 25

If r = 4 units and x = 12 units, then what is the volume of the cylinder shown above?
192 cubic units
128 cubic units
48 cubic units
768 cubic units

Answer 26

.

Answer 27

What have you found in the way of a formula for the volume of a cylinder?

\[V _{cylinder}=??\]

Answer 28

V=πr^2h

Answer 29

Search term: volume of a right circular cylinder.
Write that as V = pi (r^2) h, so that no one multiplies 2 and h by mistake.

Answer 30

\[V _{cylinder}=\pi r^2 h\]

Answer 31

What is the given radius?

Once you've found that radius, square it. What is r^2?

Answer 32

it's r times two
you multiply the raidous by 2 ?

Answer 33

No. That's why it's so, so important to write the formula correctly.

\[V=\pi r^2 h\]

Answer 34

requires that you SQUARE the radius. In other words, multiply the radius by itself. Do NOT multiply the radius by 2.

What is the given radius?

What is the square of this radius?

Answer 35

it's 16,I'm talking about the second question i posted by the way I hope im atleast close :P I'm abit confused

Answer 36

If r = 4 units and x = 12 units, then what is the volume of the cylinder shown above?

Answer 37

Yes the square of r here is the square of 4 units, which comes out to 16 units squared.

Now, if the formula for the volume of this cylinder is V = pi r^2 h,
and r^2 = 16 units squared (16 square units), find V.

Answer 38

do i have to multiply r^2 times h to get V?

Answer 39

Yes. That's what the formula says. By all means be sure to include pi in the overall formula.

V = pi r^2 h.

Here, V = pi ( ? ) h

finish this, please.

Answer 40

It's 192

Answer 41

What's 192?

Answer 42

Not to be picky, but I need to know where everything came from.

Answer 43

Ok

Answer 44

R^2 times h= 192

Answer 45

At this point i just wanna learn it

Answer 46

Remember, I've asked you to find V. V= pi (r^2) h, so you can NOT leave out pi.

True, (r^2) ( h) = 192.

But that' s not the volume.

What is the volume? Must include pi.

V = ?

Answer 47

how do you find pi, also this question timed out again

Answer 48

pi is a basic quantity that you must learn and remember.
pi is often taken to be 3.14.
You should know this, but you could also avoid having to memorize the 3.14 value by simply typing "pi".

V = pi (r^2) h.

becomes V = pi (16 square units) (12 units) = ???

Answer 49

sorry you got timed out.

Answer 50

It's ok i rather learn it so i won't have to worry about it when I'm doing it by myself

Answer 51

It's not like it's going to take of points

Answer 52

pi shows up any time you need to find the area or volume of a shape or solid that is partially round.

OK, then remember and review this : pi has the approx. value 3.14.

It does not have units.

Thus, here, your volume is

V = pi (16 square units) (12 units).

This simplifies to V = pi (192 cubic units), or V = (192 cubic units) pi. (That's multiplication."

Any questions about this problem?

Answer 53

In summary, if r=4 ft and x = 12 ft,
the volume of the cylinder is

V=pi (4 ft)^2 (12 ft) = 192 (ft^3)* pi. Simple as that.

Answer 54

So V=pi and 192 is pi but i have to put it in the pi symbol in the volume

Answer 55

Please summarize this conversation for later reference.

Write down the formulas for the volumes of 1) a cube, 2) a rectangular prism, 3) (et.c).
Review them often.

Be very careful to include units of measurement as appropriate.

Answer 56

I will copy it all down in microsoft since i use it alot

Answer 57

So V=pi and 192 is pi but i have to put it in the pi symbol in the volume

Not quite. No, V is not = pi and 192. It's V = pi times 193 (units^3).

No addition here; it's multiplication.

Answer 58

Seems like a tiny mistake, but it's actually a big one.

No addition in V = pi (r^2) (h).
All multiplication!

Answer 59

Ohhh ok also you meant 192 right or was i wrong about it?

Answer 60

Review what you typed.

You said V is pi and 192. Not so.

That implies addition. No. Not so.

V = pi (r^2) (h): Volume of a right circular cylinder is pi times (r squared) times height (h).

Only multiplication here. NO addition, no "and".

Answer 61

Happy to be of help,b ut I must get off the 'Net now.

Might be on again tomorrow if you have further qeustions.

Thank you for your persistence, and good night.

Answer 62

Good night