Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Ti-84 Evo

education.ti.com

Post reply on HN
Print view View original

241–250 of 503 posts

Re: Ti-84 Evo

#241

Post by glitchc »

59percentmore wrote: post #178
ziofill wrote: post #153

About 25 years ago my parents got me a Ti84 as a surprise for Christmas and they hid it in the attic so I couldn't find it in the meantime. A few months went by and a couple days before Christmas, when it was time to wrap the presents they couldn't find it anymore. My dad went out and got a Casio something as a late minute replacement, and that was the calculator I used in high school and I never knew about this stor…

Must have been closer to 20 years, 84(+) didn't come out until 2004. Gonna be pedantic/crotchety about this because I got into advanced math classes but it was my brother who got the 84+ (I had to settle for a 83+). Guess who's the engineer now, and who's the NEET? Your kids pay attention to what (who) you value, folks.

Sounds like he needed all the help he could get.

Re: Ti-84 Evo

#242

Post by Suppafly »

vvpan wrote: post #38

We had to buy those calculators for highschool and it was a waste of money, felt like somebody must be paying somebody off to have thousands of students buy a device that they will certainly never have to use (and is of little educational value).

>We had to buy those calculators for highschool and it was a waste of money, felt like somebody must be paying somebody off to have thousands of students buy a device that they will certainly never have to use (and is of little educational value).

I suppose it depends if you took advanced math classes or not.

Re: Ti-84 Evo

#243

Post by joshcartme »

linsomniac wrote: post #215
jkubicek wrote: post #200

Earlier quoted context omitted.

This is why you always mount outlets with the grounding pin facing up!

... it was an ungrounded plug... Plus it was a chain, so it'd drape across all 3. TBH, in the house I mount them ground down, but under cabinets or in the garage/shop or etc I mount it ground up.

I think ground up commonly indicates that an outlet is controlled by a switch on the wall. It's not code, but I think it's a convention

Re: Ti-84 Evo

#244

Post by Archelaos »

TheMagicHorsey wrote: post #160
ziofill wrote: post #153

About 25 years ago my parents got me a Ti84 as a surprise for Christmas and they hid it in the attic so I couldn't find it in the meantime. A few months went by and a couple days before Christmas, when it was time to wrap the presents they couldn't find it anymore. My dad went out and got a Casio something as a late minute replacement, and that was the calculator I used in high school and I never knew about this stor…

Hahaha! This is great. Somewhat related. My mom once yelled at me for losing a necklace she really liked. Then we were moving her stuff out of her house and found the necklace behind a wardrobe, wedged between it and the wall. It had been there for like 40 years, layered in dust.

On 9 July 1537, Martin Luther wrote in a letter to Wolfgang Capito about a lost golden ring: "Pro annulo aureo gratias tibi agit mea Catharina, quam vix unquam magis indignatam vidi, quam ubi sensit, cum vel furto sublatum, vel sua negligentia (quod nec mihi verisimile est, licet usque ingerenti) amissum, quod persuaseram ei, hoc donum esse felix omen et augurium ei missum, tanquam nunc certum esset, vestram Ecclesiam cum nostra suaviter concordare; id mire dolet mulieri."[1]

When Luther's house in Wittenberg was excavated about 20 years ago, a golden ring[2] was found that must have been deposited there before 1540. It is therefore quite likely that this is the ring mentioned by Luther in 1537.

[1] See WA, BR 8: no 3162 -- https://archive.org/details/werkebriefwechse08luthuoft/page/...

[2] Here is an image of the ring: https://www.zum.de/Faecher/G/BW/Landeskunde/rhein/geschichte...

Re: Ti-84 Evo

#246

Post by al_borland »

Suppafly wrote: post #242
vvpan wrote: post #38

We had to buy those calculators for highschool and it was a waste of money, felt like somebody must be paying somebody off to have thousands of students buy a device that they will certainly never have to use (and is of little educational value).

>We had to buy those calculators for highschool and it was a waste of money, felt like somebody must be paying somebody off to have thousands of students buy a device that they will certainly never have to use (and is of little educational value). I suppose it depends if you took advanced math classes or not.

My high school required one for a math curriculum that was specifically designed with the idea that students would not need advanced math classes. It kids up for failure if they were hoping to move toward higher level math in college, as the fundamentals were never adequately taught. But at least they sold thousands of calculators to kids who would never use them again.

They actually started us on them in 7th or 8th grade.

Re: Ti-84 Evo

#247

Post by vscode-rest »

vkou wrote: post #224
rogerrogerr wrote: post #64

Earlier quoted context omitted.

The contrived ones where they make you graph stuff, but that’s about it.

There is no graphing problem that you'll be asked to solve before university that can't be plotted to a 'good enough for high school' level by hand in seconds . Four data points is sufficient to give you a 'good enough' shape and position of a second-degree polynomial. Five or six for a third-degree one. (And you barely see them, and don't learn how to algebraically solve for their roots in high school anyways, becau…

Life is not all about solving problems, high school life even less so.

Personally, I found great enjoyment in coming up with more and more involved plots in the Polar and Parametric modes, where yes I would predict what a graph would look like and then go over to see it. And then go back and iterate. Etc. Until I was painting pictures with functions and had a far greater understanding of the domain than I’d wager anyone who thinks graphing calculations are for finding roots of polynomials could imagine.

Re: Ti-84 Evo

#248

Post by kevin_thibedeau »

kristopolous wrote: post #62

Show me a highschool math problem you can't do on a $12 Casio scientific like the classic FX-300MS https://www.usaofficemachines.com/csofx300ms-fx-300ms-scient... There's even knockoffs of it for $1: https://www.aliexpress.us/item/3256809744184708.html I picked one up when the 99 cent store was shutting down. It works fine. Look what you can get for $20: https://www.casio.com/intl/scientific-calculators/product.FX...…

Most of those are counterfeit knockoffs and the buttons are unreliable. It's safer to buy an older, pre-VPAM variant of the 300 or 991 models.

Re: Ti-84 Evo

#250

Post by dgrin91 »

Why do you need an online calculator subscription? I can kind of get why you want a physical calculator, especially for a school environment, but why would you want a calculator online when you can just use... the rest of the web?
Post reply on HN