Area of a Sphere?

[olds]

A=4*Pi*R2

I hate math.
Shouldn't the answer be 15386?

http://www.youtube.com/watch?v=skVrRuhwJjM#t=1m46s

 

[rcpratt]

You should use a more precise value than 3.14. His answer is consistent with a more precise value for pi.

 

[olds]

You should use a more precise value than 3.14. His answer is consistent with a more precise value for pi.

Ah, thanks.

And exactly why I hate math.

 

[EagleKeeper]

Ah, thanks.

And exactly why I hate math.

the only math you need to know is 1 + 1 = 3

 

[olds]

the only math you need to know is 1 + 1 = 3

I have that one down pat.
Stupid thing is, I'll get tested on this stuff and never use it again.

 

[Possessed Freak]

the only math you need to know is 1 + 1 = 3

It is, for large values of 1.

 

[dabuddha]

You mean surface area?

 

[Murloc]

You mean surface area?

lol this.

Also don't get hung up on numbers, the pi value is approximated and the calculator approximates stuff too.
What must be right is the symbolic calculations. Unless the test asks for numeric values and they don't check how you arrived to the results.

 

[olds]

You mean surface area?

Yes.
But since I am a math dunce, what other types of area are there in a sphere?

 

[DisgruntledVirus]

Yes.
But since I am a math dunce, what other types of area are there in a sphere?

Some people say area but mean volume.

 

[Phoenix86]

Some people say area but mean volume.

Area inside a sphere is volume. Area on the outside of a sphere is surface area. Then there's the area outside the sphere but within another confined space.

"Area" alone is a bad term to use in this regard.

 

[olds]

Some people say area but mean volume.

I have a different formula for volume: V=4/3 Pi R2
Haven't worked it though.

 

[olds]

Area inside a sphere is volume. Area on the outside of a sphere is surface area. Then there's the area outside the sphere but within another confined space.

"Area" alone is a bad term to use in this regard.

OK, I did see it referred to as "SA".
Thanks.

 

[IronWing]

Area inside a sphere is volume. Area on the outside of a sphere is surface area. Then there's the area outside the sphere but within another confined space.

"Area" alone is a bad term to use in this regard.

You take that back! You'll confuse Olds.

 

[IronWing]

I have a different formula for volume: V=4/3 Pi R2
Haven't worked it though.

For an extra credit problem in HS calculus class I had to derive that formula except I did it correctly and came up with R^3.

Initially the teacher wouldn't give me credit because he was expecting students to get to the answer using shells and I came at it using disks.

 

[SphinxnihpS]

Area inside a sphere is volume. Area on the outside of a sphere is surface area. Then there's the area outside the sphere but within another confined space.

"Area" alone is a bad term to use in this regard.

Yes, but it's more incorrect to say area when meaning volume, so good faith dictates that we take this mistake as the omission of surface rather than the confusion between area and volume, negating the the need for the clarifying question, at least until further idiocy is detected in this specific regard.

In other words, asking him if he means surface area or volume is more asinine than him simply leave the word surface out of his sentence.

 

[Sable]

It's mathS.

hth

 

[SunnyD]

the only math you need to know is 1 + 1 = 3

Especially if you forget to use a condom. :whiste:

 

[Phoenix86]

You take that back! You'll confuse Olds.

I used old man language. Where's my cane?

 

[SphinxnihpS]

Especially if you forget to use a condom. :whiste:

Who uses condoms? Waste of sex.

 

[SunnyD]

Who uses condoms? Waste of sex.

People who fail at maths, obviously.

 

[Phoenix86]

Yes, but it's more incorrect to say area when meaning volume, so good faith dictates that we take this mistake as the omission of surface rather than the confusion between area and volume, negating the the need for the clarifying question, at least until further idiocy is detected in this specific regard.

In other words, asking him if he means surface area or volume is more asinine than him simply leave the word surface out of his sentence.

I'd be hard pressed to disagree, however I would also not put it past some teachers to make mistakes or use improper wording.

 

[olds]

I'd be hard pressed to disagree, however I would also not put it past some teachers to make mistakes or use improper wording.

Youtube is my teacher

 

[rcpratt]

I have a different formula for volume: V=4/3 Pi R2
Haven't worked it though.

As someone else already noted (kinda), the correct equation for volume of a sphere is V = (4/3)*pi*r^3.

 

[olds]

As someone else already noted (kinda), the correct equation for volume of a sphere is V = (4/3)*pi*r^3.

Oops, I have 3 written down but typed 2. (As much as you can type on a Kindle.)