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# What are the different types of number systems available in scientific calculator?

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# Is scientific calculator is an embedded system?

Yes, the scientific calculator is an example of an embedded system. In fact, an electronic calculator was one of the first applications of an embedded microcontroller. I…t is considered an embedded system because in addition to calculating answers, it is also handling low level functions such as input from the keypad and output to the LCD screen. (MORE)

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# What are different types of computers available?

Machical like Babbages Difference Engines 1 and 2 and then his steampunk analytical engine. Analogue Computers, Electronic Computers, Mainframe Computers, Super Computers, App…le Computers, Microsoft computers, Unix, Linux and solaris Computers , Atari, Amstrad, IBM, ZX Spectrum, Commadore 64, psion , Tablet computers, PDA's, Laptop Computers, Sony, Toshiba, HP, Packard Bell, AJP, Advent, Acer, Samsung, Netbooks, Ipad, iPod touch, and Iphone. And Servers are kind of a computers. (MORE)

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# What is the difference between a calculator and a scientific calculator?

a calculator adds, subtracts, multiplies and divides numbers and numbers with decimals. it stores single numbers to memory, solves percentages, and square roots. a …scientific calculator does a little more than a calculator. it includes the Greek letter or the numeral pi, finds exponents, roots, plots data, contains the trigonometric symbols sin, cos, and tan, and the logarithmic symbols ln, log, X^10 and X^e (MORE)

# Where Can I Find a Quilting Calculator?

You have a pattern for a quilt block you like. Now you have to calculate how much of each fabric is used in the block and multiply it by the number of blocks you need for the …quilt top. Then there are the borders to consider, not to mention how much fabric you will need for the batting, backing and binding for the quilt. Quilting requires lots of math calculations. Thankfully, there are a number of wonderful quilting calculators available that can make these complicated calculations for you in seconds.[Quilter's Paradise](http://www.quiltersparadiseesc.com/Calculators.php) offers a calculator that will make a number of different calculations for you, and it's free. It will calculate how much fabric is needed if you want to cut a given number of fixed-sized pieces, how much fabric will be needed for each border, as well as calculations for batting, backing and binding. It will also provide measurement conversions. This calculator does it all.[The Quilter's Little Helper](https://itunes.apple.com/us/app/quiltingcalc/id390366459?mt=8) is a free iTunes App for smart phones and iPads. This App is extremely handy as it lets you do the calculations while you are on the go. If you are in the quilt shop and need to figure out the amount of yardage you need to buy, you will have the tool to do it.The [Quiltshops](http://search.quiltshops.com/calculator/calculator.htm) website offers a basic calculator that allows you to enter the width and height of your block, as well as the percentages of light, medium and dark fabrics you wish to use, and it will calculate how much yardage of each fabric you will need. This is a little more basic that the previously mentioned calculators, but still very useful.The [Vrya](http://vrya.net/quilt/) website offers two versions of their calculator, which you can use for free online. You are also able to purchase a version for off-line use for $3.50, which is very affordable. This is a nice option if you want to make the conversions without needing to go online. The classic calculator offers yardage estimates based on the shapes used in each block: squares, triangles, half-square triangles, half-rectangle triangles, quarter-square triangles, trapezoids, and parallelograms. The flash calculator makes the same calculations, but you can simply click on the shapes you want to use, enter the number needed and it instantly makes the yardage calculation for you.This website claims to be the oldest and most accurate calculator on the internet. [Calculate for Free]() is a basic, no-frills calculator but it offers straight-forward descriptions of calculations available and it is quick and easy to use. Interestingly, beyond the block, border, batting, backing and binding calculations, it also offers a cross-stitch calculator that is not offered by other sites.If you would prefer a more portable method of calculation, you might consider the [Quilter's FabriCalc](), a hand-held calculator. Not only does it perform all of the functions provided by the internet calculators, it also offers the ability to do a reverse calculation to find the number of shapes that can be cut from a piece of fabric, will calculate the cost of the yardage, and will store fabric yardage solutions for six individual types of fabric. The $22.00 price tag seems worth the money.Although these calculators claim to be very accurate in their yardage estimates, it would be a good idea to round up to the nearest quarter-yard in your fabric purchase, to allow for a slightly inaccurate estimate.These easy-to-use calculators eliminate the need for pencil and paper calculations and provide yardage estimates that makes it possible to buy all the fabric you will need for your project without the fear of running out of a particular fabric part way through the project. Put these calculators in your quilting tool box. (MORE)

# How Do You Conduct Scientific Method Experiments?

Many scientists conduct controlled experiments as part of the scientific method of inquiry. In controlled experiments, two groups are compared in order to determine the effect… of a treatment that is applied to only one group. This article outlines the major elements of a controlled experiment. (MORE)

# Understanding Number of Days' Inventory

Number of days' inventory is a financial statement ratio that measures how productively a company manages its inventory. This article explains how to calculate and interpret t…his important financial statement ratio. (MORE)

# Guidelines for Using a Calculator on the PSAT

Every October, high school students have the opportunity to take the PSAT. For some students, this exam is a way to practice for the SAT. For high-scoring students, the PSAT… offers the opportunity to qualify for National Merit Scholarships. Because all test-takers will be hoping to do their best, it is important that they understand the guidelines for using calculators while taking the PSAT. Knowing when the calculator is allowed during the test will help students earn their top scores on the PSAT math section.Students are strongly encouraged to bring and use calculators on the PSAT, and scientific or graphing calculators are recommended. The PSAT includes 38 math questions covering topics such as algebra, geometry, statistics, functions, and probability. Students will find that many questions with are easier and quicker to solve with the aid of a calculator.While calculators are strongly encouraged by the PSAT, they are not provided for test-takers. Some schools may offer calculators for use during the test as a courtesy, but students should plan to bring their own calculator to the PSAT. There's also an advantage to bringing one's own calculator: It will be a familiar calculator the student is comfortable operating.Not every problem on the PSAT math section will require a calculator to solve. In fact, all of the math can be done without a calculator; but having the opportunity to add, subtract, multiply, divide, and take roots helps students conserve time. On a timed exam, studies show the students who used calculators did slightly better than those who did not use one. Calculators are likely to improve accuracy and save time in solving problems.While the PSAT currently allows even the most advanced model of graphing calculators, there are some calculation devices students cannot bring to the test. Test-takers are not allowed to use computers, cell phones, adding machines with paper tape, calculators with QWERTY keyboards, or electronic organizers. In addition, calculators with jumbo displaysâ€”those that have characters an inch or more in height that may potentially be seen by other test-takersâ€”require the user to be seated at the discretion of the test supervisor.Students are not allowed to share calculators during the PSAT. In order to insure they have a working calculator for the test, students should make sure their batteries are fresh and their calculator is in good working order. In addition, students are allowed to bring a backup calculator to the test. Having even just a basic, four-function calculator available is preferable to working the entire exam without one.While graphing calculators are permitted during the PSAT, students can successfully complete the test using a calculator without graphing capabilities. If a graphing calculator is not within a family's budget, they should look for a quality scientific calculator, many of which cost under $20.PSAT math questions are designed for test-takers who will be using calculators. While all questions technically are answerable without calculators, students seeking to earn top scores and potentially qualify for National Merit Scholarships will want to be sure to use them. Every student who wants to earn the best scores possible should be sure to understand the guidelines for approved calculators, ensuring a more productive and successful test day. (MORE)

# New Cholesterol Treatment Calculator Flawed?

On November 12, 2013 the American Heart Association (AHA), in conjunction with the America College of Cardiology, released new guidelines for the treatment of high blood chole…sterol. The initial reaction was mixed, but one thing was clear: a dramatic increase in the number of Americans taking statin medications to lower cholesterol and heart disease risk was likely as many more will now 'qualify' for statin medication than ever before.In a dramatic twist, on November 18, 2013 - just six days after the new guidelines were released - warnings flared. Two leading cardiologists challenged the accuracy of the calculator used to determine whether statin medication is warranted. They believe the new calculator overstates heart disease risk and will result in over-medication. Indeed, the concern is so large that, as reported by Time, "leading cardiologist Dr. Steven Nissen â€” chief of cardiovascular medicine at the Cleveland Clinic and a past president of the American College of Cardiology â€” called for a halt on Sunday to implementation of the new guidelines."No: the calculator is one element of the new guidelines. But it's an important one. Broadly, the new guidelines recommend statins for anyone at significant risk of developing Atherosclerotic Cardiovascular Disease or ASCVD (basically, heart disease) in the next ten years.There are four groups of people who the new guidelines define as at risk for ASCVD and thus should take statins: a) those who already have cardiovascular disease; b) anyone with LDL (bad) cholesterol of 190 mg/dL or higher; c) anyone between 40 and 75 years of age who has Type 2 diabetes; and 4) people between 40 and 75 who have an estimated 10-year risk of cardiovascular disease of 7.5 percent or higher. The issue is with this fourth group of people - those whose risk is deemed high with the new calculator.At introduction, the new online calculator was available as a downloadable Excel spreadsheet on the American Heart Association's [2013 Prevention Guidelines Tools CV Risk Calculator]() page. To use it, just click the red 'download CV risk calculator,' save to your computer and fill in the numbers - you need your Total Cholesterol, HDL (good) cholesterol and Systolic Blood Pressure to fill out the form. The result will be an estimate of 10-year heart disease risk - and it's this result that is being called into question. The way the guidelines currently read, if the risk calculated is equal to or greater than 7.5 percent, then statins are recommended. Note that the risk calculator does not apply (can't be used) if you already have heart disease.According to two Harvard Medical School professors, Dr. Paul M. Ridker and Dr. Nancy Cook, the risk calculator could over-state risk of heart disease by as much as 75-150 percent, depending on the population. They tested the risk calculator using three studies of thousands of people over the last decade and found it greatly over-predicted risk. One possible reason for the (alleged) over-prediction is that the new guidelines are based on many studies, some from more than a decade ago (a time when far more people smoked than currently do, and thus had more heart attacks.) Doctors Ridker and Cook's full findings will be reported in The Lancet medial journal next week.This claim of over-prediction of heart disease risk and thus over-medication hit as the American Heart Association's annual meeting kicked off in Dallas. Several newspapers covered the result of emergency weekend meetings. As reported by the Boston Globe, "the two organizations that published the guidelines â€” the American Heart Association and the American College of Cardiology â€” said that while the calculator was not perfect, it was a major step forward, and that patients and doctors should discuss treatment options rather than blindly following a calculator." The article goes on to state that according to Dr. Sidney Smith, executive chairman of the guideline committee, "the concerns "merit attention." But, he continued, "a lot of people put a lot of thought into how can we identify people who can benefit from therapy." Further, said Smith, a professor of medicine at the University of North Carolina, "What we have come forward with represents the best efforts of people who have been working for five years."Certainly, the new calculator can be used, especially as a means for jump-starting a conversation with a doctor about heart disease risk. But it certainly should not be used blindly. The current recommendation is that the new guidelines (which recommend that anyone with a risk factor of 7.5 percent take statins) should be used as a guideline as opposed to a set-in-stone rule.One of the benefits of the new guidelines is that they take into account two important factors that didn't used to be included when calculating heart disease risk: race and stroke risk. The old cholesterol medication guidelines, which were focused on reducing cholesterol to a specific number, did not include calculations for African-Americans and the new guidelines do. Thus, the new guidelines do indeed offer a significant advance in how cholesterol is managed.The new cholesterol treatment guidelines are still 'accurate' for those with cardiovascular disease, type 2 diabetes, and with LDL-cholesterol of 190 or greater. Anyone in these groups has a relatively high risk of heart disease and should be on a statin medication. For those whose risk, according to the new calculator, is at or slightly above 7.5 percent, a frank discussion with your doctor about your level of heart disease risk is warranted. (MORE)

# Know Your Speed and Distance With Running Calculators

Many runners enjoy the simplicity of running for exercise or pleasure, using their perceived exertion as a measure of their progress. Others, however, have specific training …goals in mind. There are exact distances and paces that they hope to reach with each training session. However, those numbers can sometimes be overwhelming, especially when trying to convert distances or figure out pace. In this article, you will find a variety of online calculators to help you easily convert those numbers to align with your training goals, or simply to better understand your most recent training run.Most treadmills display speed based on miles per hour, however many runners prefer to know their pace in the form of minutes per mile. According to [Dummies.com](), you can convert miles per hour to minutes per mile with the following equations. First, divide 60 by whatever miles per hour the treadmill displays. For example, if the treadmill says you're running 7.1 miles per hour, divide 60 by 7.1, and you get 8.45 (almost 9 minutes). Next, subtract the minutes so that you are left with just the decimal that represents the number of seconds, and then multiply that decimal amount by 60. In the example given, you will subtract 8 and multiply .45 by 60 to get 27. Lastly, add that number back to the minutes, and you have your pace. So for this example,8 minutes + 27 seconds = 8:27 minutes per mile. If that is too much math to perform after an exhausting run, you can simply visit this conversion calculator from HillRunner.com.Are you running an 8K race, and would prefer to know the corresponding distance in miles? Or would you like to know exactly how many kilometers your 50 mile race is equivalent to? The long answer is that one mile is equivalent to 1.60934 kilometers, and conversely, one kilometer is equivalent to 0.621371 miles. If you prefer to avoid the math, you can simply plug the numbers into this online calculator from Metric Conversions.Are you wondering how your past race performances may predict future races of differing distances? According to [MarathonGuide.com](http://www.marathonguide.com), the body cannot sustain the same level of effort over a long run that it can over a shorter run. For most people, the running pace decreases by 4 to 5% as the distance in a race doubles. While the performance results are not guaranteed, this race results prediction calculator will provide estimated finish times based on previously completed race performances.Would you like to run a specific finishing time in your next marathon? Or perhaps you would like to know how far you will run in one hour if you maintain a seven minute per mile pace. This incredibly versatile pace calculator from Cool Running can help. According to [Cool Running](), with this calculator you can plan your race pace and splits, figure out how far you ran based on your estimated pace, or calculate the pace of your last training run.If you are running in the United States, chances are you will be measuring your distance in miles instead of kilometers. According to the [National Institute of Standards and Technology](), The United States is now the only industrialized country in the world that does not use the metric system as its predominant system of measurement.Equations and calculations can sometimes prove to be confusing and difficult. Whether you are looking to attain a specific training goal, plan your next race pace, or are simply curious as to how fast you ran during your last workout, these calculators will help simplify the running math. (MORE)

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# Are there different types of software available?

Computer software is a collection of programs which is placed in consumers computers. These consist of; programs include; data, writing tools, font functions, photo suites, ad…dress book, media player. Some of these you can choose when purchasing a new computer and some can be removed (but some cannot) In contrast to computer hardware which cannot be touched. If, you did computer wouldn't run properly. Application software this type is removable and can be added to a user's computer using a CD or online download. These can be purchased at any computer store like; Best Buys, Fry's, Office Max, Office Depot. There is hundreds of application software which include; photo editing, office, writing tools, education, banking, forms, business suites, virtual music, video games, computer games and much more. (MORE)

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# What is the difference between a scientific calculator and a graphing calculator?

A graphing calculator is a scientific calculator with a graphing display window. Otherwise, there are no limits to the type of calculations that can be made on either of them.… (MORE)

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# What are different operating systems available on the market?

there are basically 6 OS windows Linux dos mactonish apple symbian that i know even though there lots of version available VMS Ms Dos Ms- windows series …unix Linux series Mac Os IBM OS/2 Warp AmigaOS[30] GEM Symbian there are much more we don't know abt (MORE)