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How To: Remove rust from metal

This video shows how to use a wire wheel brush on an angle grinder to remove rust or old paint from metal so that it looks practically brand new. The brush is easy to find at any hardware store and costs $15-$20. He shows how to attach the brush to an angle grinder. He then demonstrates how to use it with a rusty metal finial which has been clamped down to his work bench. The brush works very quickly to remove all the rust from the finial, revealing the shiny metal. Following the instructions...

How To: Make lip gloss at home

This video shows you how to make lip gloss at home using an old lipstick, some Vaseline and a flat iron. While your flat iron is heating up, gather an old or broken lipstick, a tablespoon, a manicure stick and some Vaseline.

How To: Interpret derivatives of marginal cost and revenue

This video tells us the method of interpreting derivatives of marginal cost and revenue. If C(x) is the cost of producing x units of a product, C(400) would be the cost to produce 400 units. Now marginal cost is the cost of producing one unit which is equal to the derivative of the cost function or C'(400) which is equal to limit of h tends to zero or lim h->0 [lim(400+h)-lim(400)]/h which is approximately equal to [lim(401)-lim(400)]/1. Similarly, if R(x) is your revenue function, marginal r...

How To: "Back out the tax" from a receipt

In this video, we learn how to back out the tax from a receipt. If you have a receipt where you see how much you paid and know the tax rate, except you want to figure out the cost of the item before the tax. First, take the cost of the item including tax and what the tax rate is. To figure out the original price, let x equal the cost of the item. Add the tax to the cost of the item which will equal the cost you paid. Perform the equation 1x+(tax rate)= (total price). After you figure this equ...

How To: Work with cost & selling price markup in MS Excel

As you might guess, one of the domains in which Microsoft Excel really excels is business 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, the 48th installment in his "Excel Business Math" series of free video lessons, you'll learn about the basics of markup on cost and markup on selling price. Markup on cost uses the base cost. Markup on selling price uses the base selling price.

How To: Experiment with magnets and eddy currents

Eddy Currents are little circles of electricity created when metals are moved by magnets or even when magnets are moved by metals. To understand this practically take a regular piece of cardboard and drop it in between a horse shoe magnet. It drops normally with out being effected by the magnet. This is because the cardboard does not conduct electricity. Therefore it does not cause any eddy currents. But instead if you use an aluminum piece in the same way, it falls very slowly, because alumi...

How To: Create a life-sized foam and clay automobile model

Getting bored, or need some sort of car that costs practically nothing? This three-part video tutorial will show you how to create a life-sized foam and clay automobile model. You'll learn how to build an automotive clay model. Why would you want to build an automotive clay model? Well, for the fun of it, or because you're an automotive designers or modeler and you need to design and build a prototype of a new vehicle.

How To: Ask how much something costs in Spanish

In this free video language lesson, you'll learn how to ask how much something costs in perfect Spanish. Interested in learning Spanish but haven't got the time to take a weekly class? No problemo! The Internet is awash in free, high-quality video lessons like this one. For more information, and to get started using this phrase yourself, watch this helpful video guide for Spanish students.

How To: Calculate plate cost for a print shop in MS Excel

Love Microsoft Excel? This clip contains a tip that just might induce you to. With this free video tutorial from ExcelIsFun, the 47th installment of his "YouTubers Love Excel" or YTLE series of free video MS Excel lessons, you'll learn how to calculate total plate cost for a print shop using the VLOOKUP function. Learn to love digital spreadsheets more perfectly with the tricks outlined in this free Microsoft Office how-to.

How To: Calculate markup on cost in Microsoft Excel

As you might guess, one of the domains in which Microsoft Excel really excels is business 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, the 49th installment in his "Excel Business Math" series of free video lessons, you'll learn how to make calculations for markup on cost in MS Excel.

How To: Extrapolate given daily fixed costs 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 325th installment in their series of digital spreadsheet magic tricks, you'll learn how to create a formula that takes a fixed daily cost and calculates the monthly total for months with different number of days.

How To: Make a duct tape checkbook holder

Feel and see just what duct tape is capable of! You can practically do anything with duct tape! This folding video tutorial will show you how to make a duct tape checkbook holder. To make this duct tape checkbook holder, you'll need some duct tape, scissors, a ruler. You can fit the checkbook in this, and the register.

How To: Make duct tape flowers

Feel and see just what duct tape is capable of! You can practically do anything with duct tape! This folding video tutorial will show you how to make duct tape flowers. To make this duct tape flower, you'll need some duct tape, scissors, and some folding capabilities. This is just like making an origami flower, but with duct tape!

How To: Origami MIT's mascot brass rat

MIT's mascot, though called a brass rat, is actually a beaver. With the huge cost of the class rings, every MIT student (and those who didn't make it in) can make their own for just the cost of a square piece of paper. Watch this video origami tutorial and learn how to fold MIT's mascot the brass rat beaver out of a piece of paper.

How To: Calculate Shipping Costs with UPS

This video demonstrates how to calculate shipping costs with UPS. UPS provides an easy-to-use online calculator to help customers accurately estimate shipping costs. By following a few simple steps, this tool can help customers control their shipping costs and avoid confusion during the billing process.

How To: Build a greenhouse to grow flowers or vegetables

In this tutorial, we learn how to build a greenhouse to grow flowers or vegetables. A greenhouse means the growing season doesn't have to end. You should plan the greenhouse out on paper before you begin, and allow space for walkways, location, and more. Make sure you can afford one and know that it will cost more for you to keep the climate in this preferable to grow plants. You can put a number of different glasses on the greenhouse, so pick which one you can afford and prefer the most. Pla...

How To: Make a semiautomatic Lego rubber band gun

Semiautomatic fire is practically a necessity for modern firearms. This video features a tutorial on making your own semiautomatic gun, but instead of metal, you will be working in Legos. If you can get past the cheesy music, this is a very cool little gun, and it will allow you to annoy your friends and family with great accuracy.

How To: Approach innovation practically at work

Innovation is a lightning bolt that every company would like to bottle. Doing so in a corporate environment is nearly impossible. This video features a business expert outlining some tips for managing innovation and innovative ideas in your business, nurturing those ideas into profitable new services or products that your business can offer. It includes defining roles for different people involved in the innovation process and what steps to take in the innovation process.

How To: Save money by refinancing your mortgage

Just because fixed rate mortgage rates have dropped to historic lows doesn't mean that you should automatically refinance. With the economic climate you might not be able to refinance because many banks have tightened the rules for refinancing. As for who is eligible, you will need a 700-720 on your credit score to get the best rates. To refinance at all you need at least a 600. Generally it is worthwhile to refinance if you can save at least a half point off of your current rate. But you do ...

How To: Use SUMPRODUCT for weighted average cost in Excel

This video shows you how to calculate weighted average cost from a transactional data set using SUMPRODUCT function. It explains things very clearly. If you're working with a very large database transactions the SUMPRODUCT function makes it. It works as text if you do the formatting first and then type the number. We put the number in first and then format as text, then press F2 and ENTER.

How To: Lower the cost of home heating

Whether you use electricity, natural gas or heating oil, there are many practical steps you can take to reduce your overall heat consumption and energy bills. In addition, multi-fuel stoves and fireplaces are fast gaining popularity as alternatives to traditional heat sources. Watch this video home improvement tutorial and learn how to lower the cost of home heating.

How To: Make an explosion greeting card

This tutorial paper design video will show you how to make a greeting card that practically explodes with cuteness. These cards look so cute folded, and even cuter when they're opened. You can make these greeting cards for family and friends, no matter the occasion.

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