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HP 20b Business Function - Percent CalculationThe Menu Map for the Percent Calculation (%calc) Menu with four items: Markup as a percentage of cost (Mkup.%C), Markup as a percentage of price (Mkup.%P), Percent change (%Change),and part as a percentage of total (Part%Tot.). These items allow you to access sub-menus by pressing [Shift] [%calc].Note: for business problems using 20b, margin is based on price; markup is based on cost.   HP20B Keyboard: 1. Frequently-used business functions
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HP 20b Business Function - Break-evenThe break-even point for a product is the point where total revenue received equals the total costs associated with the sale of the product (TR=TC). A break-even point is typically calculated in order for businesses to determine if it would be profitable to sell a proposed product, as opposed to attempting to modify an existing product instead so it can be made lucrative. Break-Even Analysis can also be used to analyse the potential profitability of an expenditure in a sales-based business.The HP20b Menu Map for the Break-even Menu.Press [Shift][BrkEv] to open the Break-even menu. Starting with Fixed=, input known data by entering a number and pressing [INPUT]. Scroll to the unknown variable by pressing [Down Arrow] or [Up Arrow] repeatedly. Press [=] to calculate it.To reset the Break-even menu, HP20B Keyboard: 1. Frequently-used business functions
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HP 20b Atmel AT91SAM 32-bit ARM-based Processor The AT91SAM7L128 is a member of a series of high-performance, ultra-low power ARM7TDMI-based Processor. The ARM7TDMI RISC processor based on ARMv4T Von Neumann Architecture, runs at up to 36 MHz, providing 0.9 MIPS MHz. Two instruction sets: ARM high-performance 32-bit instruction set and Thumb high code density 16-bit instruction set. Three-stage pipeline architecture: 1. Instruction Fetch (F), 2. Instruction Decode (D) and 3. Execute (E).Memories:128 Kbytes of Flash Memory (AT91SAM7L128) - Single plane, One bank of 512 pages of 256 bytes, 10,000 write cycles, 10-year data retention capability, Protection Mode to secure contents of the Flash.64 Kbytes of Flash Memory (AT91SAM7L64) - Single plane, One bank of 256 pages of 256 bytes.6 Kbytes of Fast SRAM - Single-cycle access at HP 20b
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HP50g Full SpecificationsCalculating Environments * RPL-style RPN (Reverse Polish Notation) * EOS-style algebraic * Equation Writer (textbook-style input) * Stack display shows 7 lines by default, but it can be increased to 8 or 9 by shrinking or removing the header * Header shows current directory path and important settings, and optionally can display a digital or analog clock Expandability * SD card slot, with support for industry-standard cards up to 2 GB formatted as FAT16 (full support) or FAT32 (partial support) (Note: cards larger than 1 GB will have their free space misrepresented by Filer due to insufficient room for the number of digits, but will otherwise work fine) Communications * Infrared (IrDA and HP 82240B thermal printer supported) * USB (cable included) * RS-232 serial (cable available HP 50g Graphing Calculator Specifications
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HP 50g Factory ResetIf the settings are too confusing, it is always possible to do a full reset of the calculator by pushing an unfolded paper clip into the RESET hole at the back of the calculator. The calculator is reset but the contents of memory are retained, only the stack is cleared. Alternatively, you could perform a reset - Press and hold the top left and right keys then the [ON] button, the 50g beeps and asks whether the user wants to try to recover the contents of memory. Press any key once and followed by answering NO to this question means that the calculator will be completely reset and everything will be deleted, bringing the calculator back to its state as new.Another method is to remove all the batteries (4 AA batteries and the CR2032 cell) for about 15 minutes. Replace the batteries, the 50g will boot up. The HP 50g
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HP 20b Depreciation Straight-Line MethodA metalworking machine, purchased for $10,000.00, is to be depreciated over five years. Its salvage value is estimated at $500.00. Using the straight-line method, find the depreciation and remaining depreciable value for each of the first two years of the machineĀ“s life.Press [Shift] [Depn] keys to open the Depreciation menu starting with the "SLine" straight line method.Press [Down Arrow] key the prompt displays "Life" or the current value of the useful life. 1 is the default value. Enter value of 5 and press [INPUT] key to enter the current value for the useful life of five years.Press [Down Arrow] key the prompt now display "Start" the current value of Start=. 1 where 1 is the default value. For this example, you should leave it as the default value.Press [Down Arrow] key to move the HP 20b Business Function - Depreciation
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Online Calculator - TVM Simple Financial Calculator Calculate TVM Present Value:P Future Value:F Annual Interest Rate:%I Number of years:N Periods per year: + Online Calc
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Mathematical Formula - SOYD DepreciationInitial Cost: $Salvage Value: $Remaining Useful Life: (in years) Calculator Glossary
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Straight Line Depreciation MethodThe simplest and most commonly used, straight line depreciation is calculated by taking the purchase or acquisition price of an asset subtracted by the salvage value divided by the total productive years the asset can be reasonably expected to benefit the company called "useful life" in accounting jargon.Annual Depreciation Expense =purchase price of asset - approximate salvage value -------------------------- (divided by) --------------------------estimated useful life of assetExample: You buy a new computer for your business costing approximately $5,000. You expect a salvage value of $200 selling parts when you dispose of it. Accounting rules allow a maximum useful life of five years for computers; in the past, your business has upgraded its hardware every three years, so you think this is a more Calculator Glossary
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HP 20b comes with four advanced probability distributions: normal distribution, Chi-squared, student distribution, and F-distribution.
HP20B Keyboard: 8. Powerful Math Library
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HP 20b Statistics Data EntryThe Data menu allows you to enter up to 50 pairs of statistics data. The Memory is shared between the data and cashflow areas, the 20b has 50 slots for pairs of statistical or cashflow data in total. If you try to enter the STATS menu before you have entered any data, the 20b will enter the Data menu for you. Numbers are entered, pressing [INPUT] in between them. Once your data is input, enter the [Shift] [Stats] menu.To review or edit the entry by pressing the [Shift] [Data] and use the the [Arrow Up] and [Arrow Down] key to find the entry. Simply enter the new value and press [INPUT] to update the entry. HP20B Keyboard: 3. Powerful statistics functions
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HP Rotate and Click keysSelected models on the HP Calculators lineup have special keyboard contacts that give positive "tactile feedback" so you know the button has been depressed. The rotating design ensures contact even when pressed off-center, which prevents missed input strokes.HP calculators HP 39g+, HP 39gs, HP 40gs, HP 48gII, HP 49g+, HP 50g, HP10bII, HP 12c, HP 12c Platinum, HP 12c, HP 17bII+, HP 33s and HP 35s have the Rotate and Click keys. Calculator Glossary
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CAS Equation Writer ALGB menu DEFDefine a functionFor its argument, DEF takes an equality between: 1. the name of a function (with parentheses containing the variable), and 2. an expression defining the function. DEF defines this function and returns the equality. Typing: DEF(U(N) = 2N+1)Press [ENTER] produces the result: U(N) = 2N+1Typing: U(3)then Press [ENTER], it returns: 7Example:Calculate the first six Fermat numbers F1...F6 and determine whether they are prime. So, you want to calculate: F(k) = 22k Typing the formula: gives a result of 17. You can then invoke the ISPRIME?() command, which is found in the MATH key Integer menu. The response is 1, which means TRUE. Using the history (which you access by pressing the SYMB key), you put the expression into the Equation Writer with ECHO, and change it to: Or better, define a CAS Equation Writer
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CAS Equation Writer ALGB menu COLLECTFactors over the integers COLLECT combines like terms and factors the expression over the integers. Example 1:To factor over the integers you would type:COLLECT(X2-4) which gives in real mode: (X-2) * (X+2)Example 2:To factor over the integers you would type:COLLECT(X2-2) which gives:x2 - 2 CAS Equation Writer
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Equation Writer Selection ModeTo manipulation of mathematical expression and the four arrow keys as enabling you move through the tree in a natural fashion:The right and left arrow keys enable you to move from one branch to another.The up and down arrow keys enable you to go up and down a particular tree.The SHIFT-up and SHIFT-down arrow keys enable you to make multiple selection.To enter the following expression using Equation Writer on HP 40gs:Press CAS on the menu bar to open the Equation Writer, then type the first branch:[1] [divide] [2]then select this branch by typing the [Up Arrow] key twice.Then, type[+]and the second branch:[1] [divide] [3]then select this branch by typing the [Up Arrow] key twice.Then, type[+]and the third branch:[1] [divide] [4]then select this branch by typing the [Up Arrow] key twice.Then, type[+]and the CAS Equation Writer
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CAS Equation WriterThe HP 40g Equation Writer enables you to type expressions that you want to simplify, factor, differentiate, integrate, and so on, and then work them through as if on paper. The {CAS} key on the home menu bar takes you into the Equation Writer, and the [HOME] key takes you back out to the HP 40gs Home View Screen. The Equation Writer is a very efficient editor for writing, simplifying and transforming mathematical expressions. When you type expressions in the Equation Writer, the operator that you are typing always carries over to the adjacent or selected expression.The Equation Writer is supplied with a menu bar of menus:TOOL menu contains the commands:Cursor mode - enables you to go into cursor mode.Edit expr. - enables you to edit (modify) the highlighted expression.Change font - enables you to choose to type using HP 40gs CAS
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Factorise The Expression By Hand( X - 4 )( X + 5 ) - ( X - 40 )= X2 + 5X - 4X - 20 - ( X - 40 )= X2 + X - 20 - X + 40= X2 + 20 HP 40gs CAS
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This probe is useful in chemistry and physics when discussing the gas laws, or monitoring the pressure in a closed container during a reaction. Comes with a variety of supplemental accessories.
HP StreamSmart
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HP StreamSmart Light ProbeThis Light Sensor approximates the human eye in spectral response. Use it for inverse square law experiments or for studying polarisers, reflectivity, or solar energy. HP StreamSmart
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HP CAS on HP 40gsThe HP CAS system was created by Bernard Parisse of University de Grenoble for the HP 49g calculator. The same CAS Technology was later improved and adapted for inclusion on the HP 40g with the help of Renee De Graeve, Jean-Yves Avenard and Jean Tavenas. The HP CAS system offers the user a vast array of functions and abilities as well as an easy user interface which displays equations as they appear on the page.To access CAS Equation Writer on the HP 40gs, press [HOME] key and select {CAS} the first soft key on the right.The HP 40gs (HP40g) also includes the ability to display many algebraic calculations in "step-by-step" mode, making it an invaluable teaching tool in universities and schools. Functions are grouped by category and accessed via menus at the bottom of the screen.Learning to use the CAS on the HP 40gs is HP 40gs
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HP CAS on HP 50gThe HP CAS system was created by Bernard Parisse of University de Grenoble for the HP 49g calculator. It was later implemented on the HP 48gII, HP 49g+, and HP 50g Graphing Calculators. The HP CAS system offers the user a vast array of functions and abilities as well as an easy user interface. It also includes the ability to display many algebraic calculations in "step-by-step" mode, making it an invaluable teaching tool in universities and schools. Functions are grouped by category and accessed via choose boxes of menus at the bottom of the screen.Example: Factorise the expression (x-4)(x+5)-(x-40)Here are the steps involved:Press [Shift] [EQW].On the Equation Writer Screen, enter the following key sequence. [(] [X] [-] [4] and the press the [Up Arrow] key 4 times to highlight "(X-4)". Press [*] [(] [X] [+] [5] HP Computer Algebra System
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Why the HP50G is better than the TI89TThe biggest advantage is RPN. Writing out very complicated or tedious equations is almost foolproof. You cannot know until you experience it.Another nice thing about 50G over the 89T is the functions and superfunctions on keys are MUCH easier to read than the 89Ts. On the 50G, the colors are white, yellow, and orange on a black background. The 89T uses light green, light blue, and silver on a grey background. The buttons on the HP are stiffer and feel sturdier than the 89Ts.The screen on the HP has better contrast and it is much easier to read at an angle (like on a table next to your textbook) than the TI´s. The TI tends to get garbled when viewing from much of an angle.And the SD card slot! 2GB of memory!The TI is a really great tool, which I can crank things out on. The HP feels HP 50g
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HP 3-in-1 Graphing Calculator Emulator Apple MAC OS XThis emulator package uses the Emu48 Engine, a freewarefor Apple iBook running OS X Tiger. The engine makes use of the original HP Calculator ROM, that canbe extracted from the Calculator to run. We have package it to toggle between:HP 39gs Graphing Calculator and HP 40gs with CASHP 48g Graphing Calculator However, this pre-pack Emu48 needs a ROM image to work. Because of licensing reasons govern by HP, ROM´s aren´t included, but they can be downloaded on several other sites.Download - File Size = 2MB KBUnzip the content into Desktop VECalc Folder and drag the VECalc folder an place in inside the Application Folder.Double click 40G (state file) to run. + Free Download
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HP 20b Storage Memory RegistersHP 20b has ten calculation memories available for use during calculations. These memories are numbered from 0-9. To store numbers, press [Shift][STO]. To recall the stored number, press [RCL]. You can use the store and recall functions for these memories any time a number is displayed, or when you wish to enter a number. To store a number in a memory:Key in a number.Press [Shift][STO]. With STO displayed on the top line, key in a number, 0-9, to identify the number of the memory register where you wish to store.To recall a number in a memory:Press [RCL]. With RCL displayed in the top line, key in the number of the memory you used. HP 20b
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ATCM 2008ATCM 2008, the 13th Asian Technology Conference in Mathematics, will be held between 15 December and 19 December 2008 at Suan Sunandha Rajabhat University, Bangkok, Thailand.ATCM 2008 will continue addressing technology-based issues in all Mathematical Sciences. Thanks to advanced technological tools such as computer algebra systems (CAS), interactive and dynamic geometry, and hand-held devices, the effectiveness of our teaching and learning, and the horizon of our research in mathematics and its applications continue to grow rapidly. The aim of this conference is to provide a forum for educators, researchers, teachers and experts in exchanging information regarding enhancing technology to enrich mathematics learning, teaching and research at all levels. ATCM 2008 will cover a broad range of topics on the applicationand use of + Sales & Service
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Temperature Probe (-25 C to 110 C)The Temperature Probe (-25 degree C to 110 degree C) connects directly to the Box. The temperature sensing element receives an input voltage of 5 V and returns output voltage proportional to the measured temperature and between 0 to 5 V, which is the range accepted by the Analog-Digital converter. The Box then records the value into its memory. Typical Experiments that uses the Temperature Probe:Specific heat experiments.Measuring freezing and boiling points.Monitoring endothermic and exothermic reactions.Investigating the Combined Gas Law.Exploring loss of heat thought sweat on the human body. HP StreamSmart
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HP StreamSmart Sound ProbeThe sound probe contains a microphone with variable capacitor. One of the capacitor´s plates is actually a sound-sensitive membrane, moving back and forth as sound waves resonate through it. This capacitor is connected serial to a resistor. When the capacitor is charged, and sound waves move the membrane, which is one of the capacitor plates, the distance between the plates change, the capacity of the capacitor changes and the voltage on the capacitor and on the resistance changes. This voltage is then adjusted to a range of 0-5 V, accepted by the Analog-Digital converter of the data logger, and transformed to a value between + -2.5 V. The proper result is then recorded and stored in the data Box´s memory. The probe has a frequency range of between 35 Hz to 10,000 Hz with a Maximum Sample Rate HP StreamSmart
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HP 40g - Statistics Question 4For the data below, I key in the values of t into column C1 and 100B(t) into column C2.t: 2 4 6 8 10 12 14B(t): 0.09 0.36 1.02 1.82 2.27 2.45 2.46However, the logistic fit found by the graphic calculator does seems to have a good fit. The answer obtained is different from the answer of the book of Haese & Harris - Yr 12 Mathematical Studies Edition 2, page 169, Example 16 as well. Please take note of this matter and check if the logistic fit is suitable to be used for the students. HP 40gs
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