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yes

how can i find the area

area = (side length)^2

sorry i really need to understand this

so it would be side times length squared?

the problem tells us that
side length = 14
area = (side length)^2
find the area

ohhhh

okay

196

it would be 196

that would be 392

right.
now we need to find 100*(volume of pyramid B)/(volume of pyramid A)

so i need to multiply all those numbers right?

/ means divide

then it would be 122931200
:/

volume of pyramid B/volume of pyramid A = ?

ooops

didnt see that

ok wait

800

right, 800%
that's our final answer

thank you so much. i finally get it

can you help me with some other questions?

sure

yes

wait

US is 29.115

good, keep going with the other two

Romania is 95.239

good

Ghana is 77.206

right, so Romania has the largest population density and USA has the smallest

ahhh thats it?

yeah

thanks.
do have time for one more question?

sure

you are the best thanks for helping me out

|dw:1437327503741:dw|

|dw:1437327633016:dw|
this is kinda hard to explain, but the final answer is a cylinder

okay so what formula did you use to rotate around the y axis?

haha, there isn't a formula for this one, you kinda have to use your imagination

:D

than how do i explain

@Vocaloid Excellent explanations on all three problems!

well im glad you helped me.

yes you are really good at explaining

right, thank you, that's the sort of thing they're probably looking for

thank you so much mathstudent55 and Vocaloid

i appreciate your time and good explanation :)

You're welcome, but @Vocaloid is the one who deserves the thanks in this post.

how do i give you a medal mathstudent55?

ohh sorry.