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How To: Understand compound & continuous interest

In this video the instructor talks about compound and continuous interest formula calculations. You need to understand the concepts of simple and compound interest. Only then you can understand what the bank is doing to your money which are in your bank account. Simple interest is a method where when returning a borrowed sum to some one you pay additional price for using the money all this time. Compound interest is a similar concept where you pay interest on the original sum borrowed, and al...

How To: Find the interior angle sum of a polygon

In this tutorial the instructor shows a method to compute the interior angle sum of a polygon. He gives us the formula for the interior angle sum of a convex polygon as (n-2) * 180 where n is the number of sides of the polygon. He goes and take a 6 sided polygon as an example and does the math by substituting the value of 'n' in the equation and arrives at the result. This video clearly gives the formula and demonstrates with an example of how to calculate the sum of interior angles of a poly...

How To: Count cards

If you think that card counting is only a thing in the movies then think again. You too can try a couple of methods to help you count cards. Like anything, the more you work on it the better you will be.

How To: Find molar mass

It’s time for science. You are able to calculate the molar mass for a compound using the periodic table and the amount of compound involved. You might need to know this in your everyday life but you will definitely need this in a chemistry class.

How To: Calculate square roots on paper the easy way

Perhaps not as easy as using a calculator, but easy nevertheless! With mathematics, as with anything else, not everyone progresses at the same rate. Happily, in the age of Internet video tutorials, this isn't a problem. Those who progress quickly can go beyond what's being taught them and those who are struggling likewise have all the time in the world to catch up. With this free video math lesson, you'll learn how to find square roots by hand.

How To: Calculate a t-statistic confidence interval for a small sample size

Want to find the value of a t-statistic confidence interval for a small sample? This clip's your ticket. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. For all of the details, watch this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials.

How To: Calculate Type I (Type 1) errors in statistics

Need a quick primer on how to solve type-1 error problem in stats? Let this video be your guide. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. For all of the details, watch this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials.

How To: Complete the square

Quadratic equations are easy to solve when they can be factorized. This video teaches another method of solving a quadratic equation when its not easy to find factors for it.

How To: Calculate how much you'll need for retirement in Microsoft Excel

As you might guess, one of the domains in which Microsoft Excel really excels is finance math. Brush up on the stuff for your next or current job with this how-to. In this tutorial from everyone's favorite digital spreadsheet guru, YouTube's ExcelIsFun, part of his "Excel Finance Class" series of free video lessons, you'll learn how to use the PV and PMT functions together to decide how much you need at retirement and how much you should deposit each month during your working years.

How To: Calculate sums in standard form

When a number is expressed in the form of x multiplied by 10^y such that, x < 10 and y is an integer, the number is said to be in standard form. Standard form of expressing numbers finds its use in scientific and statistical fields. This video demostrates how to express, as well as perform basic mathematical operations namely, addition/subtraction, multiplication and division of numbers in the standard form using four examples/mathematical problems. The first two examples demostrate multiplic...

How To: Understand the rule of vertically opposite angles

In this video we learn how to understand the Rule of Vertically Opposite Angles. This says that when two straight lines cross it produces vertically crossed lines that must have congruent angles. Because the lines are straight this has to happen. Remembering the rule "supplementary" you will be able to calculate the angle of A and B in the equation. Prove what each of the angles are using the different rules and then move onto the other two angles. Angle C can be figured out by knowing that i...

How To: Wash, stain & seal an outdoor deck with Lowe's

In this tutorial, we learn how to wash, stain & seal an outdoor deck with Lowe's. First, determine the type of stain for your project, there are four main types of finishes. Check the instructions to calculate the amount of stain you need to purchase. To start, you will need to clean and dry the deck, making sure you cover your body before you begin. You will also need to use sand paper to even out the surface of the deck. After this, start to seal your deck with your choice of color. Let thi...

How To: Find the area of a triangle given three points

In this tutorial, we learn how to find the area of a triangle given three points. First, you will need to plot the points on a graph. After this, find the base and the height using the graph. Next substitute into area of a triangle formula and then evaluate. When you finally find the area of the triangle, then you will write down the answer ending it with the units. This is a simple way to find the area of the triangle, you just have to make sure you count correctly and have calculated the ar...

How To: Install a ceramic or porcelain tile floor with Lowe's

In this tutorial, we learn how to install a ceramic tile floor. Before installing, you need to prepare a solid base. First, you want to take off the trim, then calculate the area of the room. Prepare the floor by inspecting low or high spots. You will want to apply mortar, then set the backer boards into place. Screw these into place, then finish covering the floor with seam tape. Apply mortar over these then let dry. Now, you can start laying your tile onto the top of this! Once you are fini...

How To: Do an auto damage appraisal

In this tutorial, we learn how to do an auto damage appraisal. First make sure you have all your paperwork ready and lined up before you go to inspect the vehicle. When you have this done, the clients will be happier that you have everything ready to go and the claim is getting taken care of quicker. After you inspect the vehicle, write down all the notes about the vehicle and then calculate what the amount of damage is. Then, give a copy of the appraisal to the owner. After this, submit your...

How To: Build your own backyard patio

In this tutorial, we learn how to build a backyard patio. First, determine the location keeping in mind other buildings and landscape features. There should be a retaining wall around the patio so measure out all the different dimensions. Position a cap block at the highest center location. Then, use a level to transfer the patio height over the proposed location. You will then have to figure out how many blocks you need. When you calculate your digging depth, take into account your foundatio...

How To: Find APR, EAR & amortization for payday loans in Excel

New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 623rd installment in their series of digital spreadsheet magic tricks, you'll learn how to see the pain that pay day loans inflict on people using Excel. Learn how to calculate APR (Annual Percentage Rate), EAR (Effective Annual Rate), an Amortization Table and the EAR for a loan that takes a fee out up front. Learn ...

How To: Compute ratios in basic arithmetic

Looking for a guide on how to calculate ratios in basic mathematics? Look no further. This free video math lesson will show you how it's done. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just study for that next big test).

How To: Compare loans with a spreadsheet in Microsoft Excel

Whether you're interested in learning Microsoft Excel from the bottom up or just looking to pick up a few tips and tricks, you've come to the right place. In this tutorial from everyone's favorite digital spreadsheet guru, ExcelIsFun, the 45th installment in his "Highline Excel Class" series of free video Excel lessons, you'll learn how to perform debt analysis with the following input variables: % Down Payment, APR, Years, Points, Extra Fee. See how to calculate Amount to Borrow, Monthly Pay...

How To: Use Microsoft Excel 2007 as a complete beginner

If you're a novice looking to learn how to use Microsoft Excel, a video series from digital spreadsheet guru ExcelIsFun is a great place to start. But which of his many series should you choose? The one titled "Excel Basics," that's which! This free video MS Excel lesson, the very installment in said tutorial series, covers the following topics:

How To: Solve word problems involving exponential growth/decay

The first problem that is show is exponential decay. First you will need to create a table with hours and substance left. The next step is to find the trend by noting that we are left with a certain percentage of the substance. One you have the trend you will use this to calculate the amount of substance left in said hours, in this case 6 hours. The following example shows you how to solve exponential growth. It is essentially the same except for the fact that you will be increasing, so inste...

How To: Find the equation of a line in point-slope form

When you are given a point through which a line passes and the slope of that line, you can calculate the equation of that line. The general equation to solve this kind of equations is called as point-slope form. The point slope of a line passing through (a, b) with slope of m is (y - b) = m * (x - a). Now substituting the values in the above equation you can obtain the equation of the line in terms of x and y. In case you are given with two points first find the slope of the line which is the...

How To: Work with decimal numbers in prealgebra

You can do simple decimal calculation with out using a calculator once you understand the basic concept of decimals. In decimal equations when you have various operations between decimal numbers, you have to go by the order of operations in simplifying it. The order of operations states that you have to first divide, then multiply and at last add or subtract the remaining terms. You have to work the operations from left to right. Use a calculator only when you are required to multiply or divi...

How To: Create a grade book based on a total score in MS Excel

New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 193rd installment in their series of digital spreadsheet magic tricks, you'll learn how to use the SUM and VLOOKUP functions to create a grade book based on a given total score that will automatically calculate grades.

How To: Use the AVERAGE IF function in Microsoft Excel

New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 145.75th installment in their series of digital spreadsheet magic tricks, you'll learn how to use the AVERAGEIF (AVERAGE IF) function to create a formula that will calculate the average when you have more than 1 criterion.

How To: Find density using the water displacement method

To find out the density of any given object there is a simple equation, mass divided by the volume equals the density. In this video a lady is showing how to get the volume of three objects using water. First the objects are measured on a scale to find out how much they weigh, the mass. Next each one of the objects is placed into a measured amount of water to find out the volume. Before you place the object into the water you will want to know just how much water in there. That way when the o...

How To: Use neutral density or ND filters

Photography is a fast growing hobby with the relative drop in prices of high grade equipment. The use of different filters in photography is a very common thing, and different filters have very different uses. The neutral density (ND) filter reduces the amount of light reaching the film or sensor. This allows the photographer to create different effects with the available light, allowing slower shutter speeds and larger apertures. The video helps explain the differences in shutter speeds and ...

How To: Quickly find the area of a trapezoid

In this video, Mr. Maisonet provides a quick and easy method for calculating the area of a trapezoid. In the first step, The lengths of the two bases (the two sides of a trapezoid that are parallel to one another) are averaged. The lengths of the bases are first added together, and the sum is divided by two, yielding the average. The average is then multiplied by the height. The resulting product is the area of the trapezoid. This method for finding the area of a trapezoid is mathematically s...

How To: Find the area of quadrilaterals

Parallelogram is a quadrilateral in which both pairs of the opposites are parallel. To find the area of a parallelogram first draw the diagram of a parallelogram. Parallelogram can be further divided into squares and rectangles. To calculate the area of both of these kinds of parallelograms multiply the length of the parallelogram with its height. In general the area of a parallelogram in obtained by multiplying the base of a parallelogram with its altitude. In square and rectangle cases, the...

How To: Calculate the weighted average of specific values

The way to convert 0.300 Moles of water into Grams is to start by writing what you have. Then put grams on top and moles on the bottom, then put one by the mole, the omler mass goes by grams. Now you figure out the moler mass of water which has 2 H and 1 O, its 2 times 1 which is the atomic mass for hydrogen plus 16.0 for oxygen which gives a total of 18.0 g/mol. So then you insert the 18 up by the grams, now you can cancel out the moles and multiply 0.300 times 18.0g and it gives you 5.40 g,...

How To: Use Excel databases for home improvement calculations

New to Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this Excel tutorial from ExcelIsFun, the 236th installment in their series of digital spreadsheet magic tricks, you'll learn how to create a database for keeping carpentry measurements as well as how to use a COUNTIF function formula for calculating how many lumber pieces you'll need to cut for your home improvement project.

How To: Make a basic pant

In this three-part sewing tutorial, learn how to make a pair of pants that fit like a glove! In the first video, you will learn to take measurements and calculate measurements to plan out your pattern. In the second video, learn how to draw the pant pattern based on your measurement calculations, make a test pant and finalize your pattern design. Lastly, in the third installment of this series, learn how to sew on the zipper and button and stitch the legs of your pants.

How To: Identify the parts of a compass

The parts of the compass are a base plate with different measurements for calculating mileage and distance. The magnifying glass is used to magnify things on your map. The arrow at the top of the compass is called the direction of travel arrow. To find the degrees on your compass, use the rotating bezel ring, with North being "0", East being "90", South being "180", and west being "270". The magnetic needle inside has a red magnetic north end, which is used to locate "North", and the black en...

How To: Find the area between curves

This video shows how to find areas between curves. The basic idea is that we find the space trapped between two curves on a graph. The formula for finding this is top curve, subtract bottom curve and then integrate. The presenter shows a parabola that goes through the origin. Then he draws a line that runs through the origin. We try to find the area trapped between the two. You take your smallest x co-ordinate to the largest x co-ordinate, you take the curve on top (2x) and subtract the curve...

How To: Find the percent change using proportions

In this video, the instructor shows how to identify the percentage change using proportions. When a given quantity increases or decreases by certain amount then we can calculate the percentage change in the quantity, which can be either increase or decrease based on the new value of the quantity. To solve these kind of situations you should know that the ratio of amount of increase (or decrease) of an amount to its original amount is equal to the ratio of percentage increase (or decrease) to ...

How To: Find the greatest common factor, GCF

In this tutorial the instructor shows how to calculate the greatest common factor, or GCF. While computing greatest common factor, you are pulling out the smallest exponents of any common factors along with the factor. Finding the greatest common factor is similar to finding the least common multiple. When given any numbers to find the greatest common factor, the first step in the general procedure to be followed is to break each number down into its factors. You need to break down the number...

How To: Solve problems about linear equation

In this video the instructor shows how to write a linear equation. If you need to find the equation of a line that passes through the two given points then you need to find the linear equation of that line. The first step is to find the slope of the line that passes through these points. The slope can be calculated by finding the ratio of the difference of y coordinates to the difference of the x coordinates i.e. the change in y up on the change in x. Now substitute the value of slope and any...