In one sentence, describe what the following article is about: " " Your first line in the column will remain blank, because you cannot figure out a marginal cost based on no units of production. $40 minus $30. For example, 2 minus 1. For example, Marginal Cost=$10/1. In this case, the marginal cost is $10. Continue to subtract figures from the row above to figure out marginal cost for the remaining units of production.
Summary: Write out the formula "Marginal Cost=Change in Total Cost/Change in Total Quantity. Make a column to the right of total cost that says "Marginal Cost. Find change in total cost by subtracting the total cost in row 3 from total cost in row 2. Find the change in total quantity by subtracting the total quantity in row 3 from the total quantity in row 2. Plug your numbers into the formula. Write your marginal cost in the column on the second row.

Visit  https://reg.usps.com/entreg/RegistrationAction_input. Fill out the form with your personal information and address. Creating an account will give you access to a variety of USPS tools, including online tracking for select packages that you send or receive through USPS. Click “Track and Manage” at the top of the screen, then scroll down to “My USPS.” This page is your dashboard and will have a list of all of the packages you’ve received or sent in the last 2 weeks. USPS will display any packages that are currently en route to or from the address you used to register your account. Clicking on the package will bring up additional details, including where it currently is, and the post office where the package last was. You can use your dashboard to keep track of a package, even if you no longer have the tracking number or there is no tracking number associated with the package. If a package hasn’t been delivered within 7 days of the estimated delivery date, you can submit a search request and have USPS look for the package. Go to https://www.usps.com/help/missing-mail.htm and click “Start Your Missing Mail Search.” You’ll have to provide the sender and receiver's address, the size of the package, and other identifying information.
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One-sentence summary -- Sign up for Informed Delivery on the USPS website. Sign in and go to your dashboard. Click on the package you want to track. Submit a search request if your package is lost.

Q: You can reproduce these over and over again in a "factory" manner, getting an almost perfect, if not exact, duplicate.  "CNC" stands for Computer Numerical Control. The specs of your replica would be loaded into a computer processor, which would then guide the cutting. You can buy these machines in a variety of models and makes. Some use a laser to do the cutting, others use cutting tools or even plasma cutters. Most machines of this kind cost upwards of $60,0000 so turning your carving over to a professional (also called a milliner) for mass duplication on one of these machines is probably your best bet. One advantage to the CNC machine is you are not limited in materials. You can make metal, plastic or even stone duplicates of you source object.
A: These will produce technically exact duplicates.

Article: A new dog will feel most secure in its new home if it can depend on the same things happening every day. Walking it, feeding it, and putting it to bed at the same time will go a long way towards it feeling at home. A consistent schedule will also help it avoid having accidents in the house. Being fed at the same time and going out at the same time every day will allow its system to adjust quickly to its new life. When your dog gets home you can start training it after it has acclimated for a day or 2, even if it's a puppy as young as 8 weeks old. Begin with simple commands, such as "sit." Say the word "sit" every time the dog does that action naturally and give it a treat. As the dog figures out that the action it is doing is connected to the treats and the verbal cue, it will begin doing it on command. As you dog learns add more commands, such as "lie down," "stay," and "fetch."
Question: What is a summary of what this article is about?
Set a consistent daily routine. Start training your dog.

Problem: Article: When administering an IM injection, the penetrative action of the needle creates a narrow channel, or track, within the tissues. It may be possible for the medication to leak out of the body through this track. Applying the Z-track technique reduces skin irritation and allows for effective absorption by sealing the medication in the muscle tissue.  Firmly hold to keep the skin and subcutaneous tissue in place. Pull back on the plunger slightly to check for blood return, then slowly push to inject the medication. This allows the medication to evenly disperse into the tissue. A zigzag path is created that closes off the track left by the needle and keeps the medication inside the muscle tissue. As a result, patients should experience less discomfort and lesions at the injection site. Do not massage the site as this can cause the medication to leak, as well as irritation.
Summary:
Understand the advantages of the Z-track method. Repeat the steps of hand-washing, filling the syringe, and choosing and cleaning the injection site. Pull the skin taut 1 inch (2.5 cm) laterally to the side with your non-dominant hand. Insert the needle at a 90° angle into the muscle layer with your dominant hand. Keep the needle in place for 10 seconds. Withdraw the needle in a swift motion and release the skin.