Re: Question: if we cannot calculate the value of pi to an absolute, then can we even create an accurate formula for a “perfectly spherical ball”?

In theory, if we let the symbol Pi stand for all infinite digits of Pi, then yes, the formula is accurate for a perfectly spherical ball. If we try to apply Pi, then it will always be imperfect since we don't actually know the entire value, no.

But in real life applications? 3.14 is enough. But I'm speaking as a mathematician.

With regards to the original question, the point of contact would be a point, generally given as undefined but understood to be infinitesimally small. Again, for all real life applications, incalculable.

A pull plug for a cow's bath tub, because no one wants to stick their hand through that water to reach the drain.

Math Mom, Military Green, L

A pull for the cow's bath tub plug-- because no one wants to stick their hand through that water.

Math Mom, Military Green, L

Original scissor clamps made by modifying the construction of scissors.

Math Mom, L.

V, well said.
I find a few things curious about this article. For one, there are no quotes from the women about this unofficial rule. The writer isn't the same person who rode the bus, so at best the quotes are retold, at worse, exageration. Do they find women (or men for that matter) of this community find the rule discriminatory when they are the ones that ride the bus regularly? Is it a hassle for them? Somehow I think the answer is no, but it cannot be blamed on these women/men being 'brainwashed' by thier religion. It's a rule of thier faith that they choose to obey.
That being said, I think the bus company should have the legal exception to the discrimination laws since they are there to serve the Hasidic community. If that were the case, the general public should be warned about it before they plan on taking the bus.
But honestly? This has been going on since 1973 and if it really offended people who have to deal with it everyday, it would have been changed by now. But guess what... it's still around because the people who use it like it the way it is. Yes, I find it a little offensive but that's mostly because I relate it a little too closely to segregation. I may not like it but I would choose to respect it, just like I would hope others would choose to respect my faith or the faith of anyone else (or even a lack thereof).

Zombie cages. When they were first invented, everybody thought it would help keep the zombies contained. Turns out, they forgot zombies had no problem digging themselves out of the dirt in the first place and the bars were wide enough that it was easy as pie to pop off a head or set of hips to shimmy free. Thankfully the hand grenade was invented soon after.

Math Mom, L

The original harpoon cannon. Although, it usually exploded in the face, thus the string attached to the trigger... used to fend off the WWII zombie hordes as the velocity usually kept up through several rows of the undead and the fire took out a sizable number within close vicinity.

Whoops, forgot tshirt:
Math Mom, L

The original harpoon cannon. Although, it usually exploded in the face, thus the string attached to the trigger... used to fend off the WWII zombie hordes as the velocity usually kept up through several rows of the undead and the fire took out a sizable number within close vicinity.

It's a manual train horn, used to drown out the pesky passengers when they complained about the delay, or the bumpy ride, or the baby crying at the front of the car, or *WHOOO WHOO*

Math Mom, L

It's a bobbin winder machine.

Geometry is for Squares, Light Blue, L.

Albert Einstein's hair curlers... unfortunately they tended to make his hair more messy than stylishly curled.

Geometry is for Squares, Light Blue, L

It's for making the four button holes in a button.

Geometry is for Squares, Light blue, L

Or early dentistry tools, used to keep the mouth nice and wide...
Geometry is for Squares, L, Light Blue

The fish hooks that caught Moby Dick.
Geometry Is For Squares, L, Light Blue

It's the Keebler elves' workbench. You better give it back so we continue getting our cookies.

Mmm... Pi XL