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Mathematics 7 Online
OpenStudy (anonymous):

why would a school ever ask me this question? I want to know how many ping pong balls you can fit within a much larger sphere. The larger sphere has a circumference of ~96in. A ping pong ball has a circumference of ~4.9634in.

OpenStudy (amistre64):

i spose youd need to determine how much volume 6 pongs eat up and divide that into the sphere

OpenStudy (anonymous):

i have no idea how to do that?

OpenStudy (amistre64):

or maybe 5 pongs; they fit together to tesselate in some fashion

OpenStudy (anonymous):

alright ill try

OpenStudy (amistre64):

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OpenStudy (amistre64):

i got no clear way to think this thru for any suitable answer tho

OpenStudy (anonymous):

what would i give as an answer, i cant leave it blank.

OpenStudy (amistre64):

youd have to think it thru and imagine something plausible id suppose. there might be some ideas or answers on the google

OpenStudy (anonymous):

okay forsure. i looked at this and was like.. what the heck...

OpenStudy (amistre64):

lol ... yeah, and the drawing tool on here aint good to determine some tests with

OpenStudy (anonymous):

yeah the tool sucks

OpenStudy (anonymous):

can you figure this one out?

OpenStudy (anonymous):

5 foot-long cylindrical pipe has an inner diameter of 6 feet and an outer diameter of 8 feet. If the total surface area is kn(n=Pi) ,what is the value of k ?

OpenStudy (amistre64):

kn(n=Pi) ??

OpenStudy (anonymous):

k times n and n=3.14 or pi

OpenStudy (amistre64):

ahhh yeah, that ones more doable

OpenStudy (amistre64):

8pi * 5 + 6pi * 5 + 2(pi(8^2-6^2)) might get the total surface area

OpenStudy (amistre64):

make that 4^2 and 3^2 instead

OpenStudy (amistre64):

if im lucky that means k=84

OpenStudy (anonymous):

* does that mean?

OpenStudy (amistre64):

times, mulitply

OpenStudy (amistre64):

the circumference of the outer * height plus the circumference of the inner * height + 2 surface areas that are the areas of the larger - smaller

OpenStudy (anonymous):

yeah your right

OpenStudy (amistre64):

i can be at times lol

OpenStudy (anonymous):

hahaha as long as they don't involve ping pong balls

OpenStudy (anonymous):

:D

OpenStudy (amistre64):

the pongs just will take a bit of figuring to get to something useful :)

OpenStudy (anonymous):

indeed. how old are you if u dont mind me asking?

OpenStudy (amistre64):

very old, i quit counting years ago

OpenStudy (anonymous):

haha so if im 17 should i be doing these sorts of problems?

OpenStudy (anonymous):

Brian hits a baseball straight toward a 15 ft high fence that is 400 feet away from home plate. THe ball is hit when it is 2.5 feet from the ground and leaves the bat at an angle of 30 degrees with the horizontal. Find the initial velocity needed for the ball to clear the fence

OpenStudy (amistre64):

this ones doable, im trying to figure out a good process for the pongs on the side lol

OpenStudy (anonymous):

lol. dude are you like some rocket scienctist? work for nasa? haha

OpenStudy (amistre64):

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