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From Wikipedia
The Casio ClassPad 300 is the first and only (apart from the unsuccessful Sharp models EL9650 and EL9600c) stylus based calculator. HP worked on a pen based calculator called the HPXpander, as did Texas Instruments under their [http://www.datamath.org/Story/PET_Project.htm PET Project] (see TI PLT SHH1), yet both projects were cancelled before they were released to the market. The ClassPad comes with a collection of applications that support selfstudy, like 3D Graph, Geometry, eActivity, Spreadsheet, etc. A large 160x240 pixel LCD touch screen enables stylusbased operation. There is a strong resemblance between the ClassPad and the older Pocket Viewer line.
The ClassPad 300 allows input of expressions, and displays them as they appear in a textbook. Factorization of expressions, calculation of limit values of functions, and other operations can be performed while viewing the results on a large LCD screen. The ClassPad 300 comes with graphing tools for 3D graphing and drawing of geometric figures.
The user interface of the ClassPad 300 uses a pulldown menu format. Solutions, expressions, and other items can be selected with the tap of the stylus. The ClassPad 300 also supports drag and drop, copy and paste, and other penbased operations.
An eActivity application allows the creation of eActivities that can include figures, expressions, and explanations.
Product lines
ClassPad 300
This is the first ClassPad series with only 4.5 MB of flash memory.
ClassPad 300 Plus
The Plus series is equipped with a high contrast display, 5.4 MB of flash memory and comes with a standardized MiniUSB port.
ClassPad 330
This series is almost identical to the ClassPad 300 Plus except that the preinstalled firmware has been updated to at least OS 3.02.
ClassPad 330A
The A series was reported to be a version of ClassPad 330 with preinstalled OS 3.03.
History
During 1996, CASIO worked on the CAS (Computer Algebra System) and studying Geometry. The CAS was first used in the Casio CFX9970G then the Casio Algebra FX 2.0, and later formed the core math system for the ClassPad.
In 1999, with the help of many teachers and friends, the idea of the eActivity emerged. It would allow all applications to interact from within one application, and display information in a textbook style.
In 2000 CASIO opened a new office, the CASIO Education Technology M.R.D. Center in Portland, Oregon, USA. They hired engineers familiar with programming PCs and specialists from the education field. Ideas from around the world were now being implemented into the ClassPad by Tokyo R&D and Portland MRD Team.
In 2002 CASIO completed a prototype for the ClassPad. Before the prototype was complete, an emulator was used for testing. The emulator was so good that CASIO decided to include the emulator in the software that was being developed for data transfer. The data transfer and emulator software merged into one product called the ClassPad Manager.
In 2003 CASIO finally released the ClassPad 300.
In 2005 CASIO released the ClassPad 300 Plus featuring more flash memory, a better display and standardized MiniUSB.
In 2007 CASIO released the ClassPad 330 featuring a preinstalled version of OS 3.02 or OS 3.03.
ClassPad OS 3.0
In 2006 CASIO released OS 3.0 for the ClassPad. OS 3.0 featured Laplace and Fourier transform, differential equation graphs, financial functions, AP statistics and parameterized 3D graphs. Subsequent releases were only available for users with OS 3.0 or later.
In 2006 CASIO released OS 3.01 for the ClassPad. OS 3.01 concentrated solely on bug fixing.
In 2007 CASIO released OS 3.02 for the ClassPad. OS 3.02 concentrated solely on bug fixing.
In 2008 CASIO released OS 3.03 for the ClassPad. OS 3.03 featured new probability distribution functions, an extended numeric solver and several user interface improvements.
In 2009 CASIO released OS 3.04 for the ClassPad. OS 3.04 featured an updated spreadsheet application, stat function enhancements and several user interface improvements. Also, there were two hotfix releases for OS 3.04.3000  namely: OS 3.04.4000 and OS 3.04.5000
In 2010 CASIO released OS 3.05 for the ClassPad. OS 3.05 featured new financial functions and an 'on data' option for quartile calculation.
From Yahoo Answers
Answers:QD 117 312 57 72
Answers:No, because you're supposed to know that stuff, because that's some of what they're testing you on.
Answers:yes, so 720/360 = 2 which means each degree represents 2 tickets so 140 degrees is 280 20 tickets = 5600 120 degrees is 240 15 tickets = 3600 100 degrees is 200 10 tickets = 2000 so the total is then 11200
Answers:You can do this if you work from the bottom up. Row 4: [42] Row 3: [18] [] [what = 18 = 42?] 24 + 18 = 42 so row 3: [18] [] [24] Now plug variables in for the empty spaces like this 7de8 abc 1824 build equations to total 18 and 24, replacing variables where you have them. I'll do 18. 18 = a + b 18 = (7 + d) + b 18 = (7 + d) + (d + e) 18 = 7 + 2d + e When you do 24, you'll find that it too can be reduced down to using only the variables d and e. You have two variables and two equations, so you'll be able to solve for the variables. Using one equation, solve for one of the variables (let's say d). Plug that reduced form into the other equation and solve for the variable (that would be e). Using either equation, use the answer you have for e and solve for d. Hopefully you are confident solving for variables with two equations. If not, check your book for review.
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