How to Use a Scientific Calculator

You might know all the formulas for math and science problems, but if you dont know how to use your scientific calculator, youll never get the correct answer. Heres a quick review of how to recognize a scientific calculator, what the keys mean, and how to enter data correctly. What Is a Scientific Calculator? First, you need to know how a scientific calculator is different from other calculators. There are three main types of calculators: basic, business, and scientific. You cant work chemistry, physics, engineering, or trigonometry problems on a basic or business calculator because they dont have functions youll need to use. Scientific calculators include exponents, log, natural log (ln), trig functions, and memory. These functions are vital when youre working with scientific notation or any formula with a geometry component. Basic calculators can do addition, subtraction, multiplication, and division. Business calculators include buttons for interest rates. They typically ignore the order of operations. Scientific Calculator Functions The buttons may be labeled differently depending on the manufacturer, but here is a list of common functions and what they mean: Operation Mathematical Function + plus or addition - minus or subtraction Note: On a scientific calculator there is a different button to make a positive number into a negative number, usually marked (-) or NEG (negation) * times, or multiply by / or à · divided by, over, division by ^ raised to the power of yx or xy y raised to the power x or x raised to the y Sqrt or √ square root ex exponent, raise e to the power x LN natural logarithm, take the log of SIN sine function SIN-1 inverse sine function, arcsine COS cosine function COS-1 inverse cosine function, arccosine TAN tangent function TAN-1 inverse tangent function or arctangent ( ) parentheses, instructs calculator to do this operation first Store (STO) place a number in memory for later use Recall recover the number from memory for immediate use How to Use a Scientific Calculator The obvious way to learn to use the calculator is to read the manual. If you got a calculator that didnt come with a manual, you can usually search for the model online and download a copy. Otherwise, you need to do a bit of experimentation or youll enter in the right numbers and still get the wrong answer. The reason this happens is that different calculators process order of operations differently. For example, if your calculation  is: 3 5 * 4 You know, according to the order of operations, the 5 and the 4 should be multiplied by each other before adding the 3. Your calculator may or may not know this. If you press 3 5 x 4, some calculators will give you the answer 32 and others will give you 23 (which is correct). Find out what your calculator does. If you see an issue with the order of operations, you can either enter 5 x 4 3 (to get the multiplication out of the way) or use parentheses 3 (5 x 4). Which Keys to Press and When to Press Them Here are some example calculations and how to determine the correct way to enter them. Whenever you borrow someones calculator, get into the habit of performing these simple tests to make sure youre using it correctly. Square Root: Find the square root of 4. You know the answer is 2 (right?). On your calculator, find out whether you need to enter 4 and then press the SQRT key or whether you hit the SQRT key and then enter 4.  Taking the Power: The key may be marked xy or yx. You need to find out whether the first number you enter is the x or the y. Test this by entering 2, power key, 3. If the answer was 8, then you took 23, but if you got 9, the calculator gave you 32.10x: Again, test to see whether you press the 10x button and then enter your x or whether you enter the x value and then press the button. This is critical for science problems, where youll live in the land of scientific notation!Trig Functions: When youre working with angles, keep in mind many calculators let you select whether to express the answer in degrees or radians. Then, you need to determine whether you enter the angle (check the units) and then sin, cos, tan, etc., or whether you press the sin, cos, etc., button and then enter the number. How do you test this: Remember the sine of a 30-degree angle is 0.5. Enter 30 and then SIN and see if you get 0.5. No? Try SIN and then 30. If you get 0.5 using one of these methods, then you know which works. However, if you get -0.988 then your calculator is set to radian mode. To change to degrees, look for a MODE key. There is often an indicator of units written right up with the numerals to let you know what youre getting.

Improving The Decision Making Process - 798 Words

confidence will increase due to equality. Appointing more minorities to judgeship can produce diverse perspectives and improve the decision making process. In order to accommodate minorities and underline the importance of racial equality, the judicial system must implement innovative changes to better serve the country’s ethnic diversity. Torres-Spelliscy et al. (2010) encouraged diversity in the American court system and provided ten practices to attract the brightest female and minority candidates for the judiciary, and they are as follows: (1) grapple fully with implicit bias; (2) increase strategic recruitment; (3) be clear about the role of diversity in the nominating process in state statutes; (4) keep the application and interviewing process transparent; (5) train commissioners to be effective recruiters and nominators; (6) appoint a diversity compliance officer or ombudsman; (7) create diverse commissions by statute; (8) maintain high standards and quality; (9) raise judicial salaries; and (10) improve record keeping (p. 3). Appointing minorities and females to the U.S. bench will increase public confidence, and it will also bring important value towards the representation of women and ethnic groups. The three necessary changes that need to occur for the criminal justice system to facilitate tolerance among criminal justice practitioners are as follows: (1) educate and provide training for individuals working in the criminal justice system (e.g. police officers,Show MoreRelatedThe Rational Thinking Is Very Powerful Word1464 Words   |  6 PagesThinking is very powerful word as it help us in making a decision which is appropriate. As in rational thinking there is logical and reasonable thinking and the decision maker is free from all the restriction such as sentiment. So the decision is made on the basis of original facts and knowledge not on the sentiment. As all the people have the ability to make the logical decision to every problem but they face a sentiment due to which they usually take decision without thinking about the reason. 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Pore Structure Of Hydrated Cement - 1398 Words

PORE STRUCTURE IN HYDRATED CEMENT CE13B1023 Vatsal mittal INTRODUCTION When cement is mixed with water in order to prepare concrete, the hardened concrete formed after hydration is not a solid mass but a porous material. There is formation of pores due to water which is initially added. Water occupies some fraction of the total initial volume and after the hydration of cement water is held physically, chemically or is adsorbed on product after hydration. This leads to formation of different types of pore structure inside the hydrated cement. CLASSIFICATION OF PORES STRUCTURES IN HYDRATED CEMENT Capillary pores:-The hydration of cement leads to formation of a network of hydrated solid product with the left empty spaces between the hydrated products that are occupied by water left after hydration. These residual spaces are known as capillary pores. The capillary porosity of the cement paste depends on the original water-cement ratio and on the amount of cement that has become hydrated. 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Changes In The Victorian Age Essay Research free essay sample

Changes In The Victorian Age Essay, Research Paper The alterations in the Victorian Age, about 69 old ages long, contributed more to the promotion of the universe than the other two thousand old ages of it s being. It was a clip of enlargement, reform, and technological promotion. Thus grade couple was basically right in stating that British history is two thousand old ages old, and yet in a good many ways the universe has moved further in front since the queen was born than it moved in the remainder of the two thousand old ages put together. A moderate Whig, Lord Palmerston, had between 1830 and 1840, helped to spread out the British imperium. He served as their foreign curate and with the appropriation of new Zealand and the beginning of a war with China, it seemed as though Palmerston s clever diplomatic negotiations showed promise for the British. This thought was affirmed with eventual acquisition of Hong Kong in 1842. We will write a custom essay sample on Changes In The Victorian Age Essay Research or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page British kept spread outing. During much of the 1830 s many new reforms were passed under Lord Melbourne of the Whig party. Slavery Washington s abolished in the British Empire and the first kid labour limitations were passed. In 1832, the Reform measure was passed, spread outing elector rights to work forces with belongings. When Sir Peel of the Tories came into power, He abolished the maize Torahs leting some easiness to famine victims. The Mid-Victorian period proved to be a clip of prosperity in the field of engineering. The McCormick harvester prevented agricultural diminution while the Bessemer procedure helped simplify the steel doing procedure, profiting the industry and increasing fabric imports. Transportation system of people and goods was made easier by steamers and railroads, besides diminishing their costs. Antiseptic surgery was introduced by Joseph Lister and Florence Nightingale introduced the first modern nursing school. Many of the alterations that took topographic point in Britain during those about seven decennaries greatly affected the remainder of the universe. New things were introduced into the universe, revolutionising it, traveling it one measure closer to the modern universe today. And in 1897, Mark Twain saw that.