In one sentence, describe what the following article is about: Unlike finding a single average, where we used a one-column list of numbers, to find a weighted average we need two sets of numbers. For the purpose of this example, we’ll assume the items are shipments of tonic, dealing with a number of cases and the price per case.  For this example, we’ll include column labels. Enter the label “Price Per Case” in cell A1 and “Number of Cases” in cell B1. The first shipment was for 10 cases at $20 per case. Enter “$20” in cell A2 and “10” in cell B2. Demand for tonic increased, so the second shipment was for 40 cases. However, due to demand, the price of tonic went up to $30 per case. Enter “$30” in cell A3 and “40” in cell B3. Because the price went up, demand for tonic went down, so the third shipment was for only 20 cases. With the lower demand, the price per case went down to $25. Enter “$25” in cell A4 and “20” in cell B4. Unlike figuring a single average, Excel doesn’t have a single function to figure a weighted average. Instead you’ll use two functions:  SUMPRODUCT. The SUMPRODUCT function multiplies the numbers in each row together and adds them to the product of the numbers in each of the other rows. You specify the range of each column; since the values are in cells A2 to A4 and B2 to B4, you’d write this as “=SUMPRODUCT(A2:A4,B2:B4)”. The result is the total dollar value of all three shipments. SUM. The SUM function adds the numbers in a single row or column. Because we want to find an average for the price of a case of tonic, we’ll sum up the number of cases that were sold in all three shipments. If you wrote this part of the formula separately, it would read “=SUM(B2:B4)”.  The average per-case price is the total value of the shipment divided by the total number of cases that were sold.  The total value of the shipments is 20 x 10 + 30 x 40 + 25 x 20, or 200 + 1200 + 500, or $1900. The total number of cases sold is 10 + 40 + 20, or 70. The average per case price is 1900 / 70 = $27.14.
Summary: Enter the data you want to calculate a weighted average for. Enter the formula you need to calculate the weighted average. Since an average is determined by dividing a sum of all numbers by the number of numbers, we can combine the two functions into a single formula, written as “=SUMPRODUCT(A2:A4,B2:B4)/ SUM(B2:B4)”. Observe the result in the cell you entered the formula in.

In between the <head> and </head> tags of your HTML document, insert the following JavaScript code: function blinktext() {  var f = document.getElementById('announcement');  setInterval(function() {    f.style.visibility = (f.style.visibility == 'hidden' ? '' : 'hidden');  }, 1000);} The code above defined a function and named it "blinktext." In order to use this function in your HTML, change the <body> tag to <body onload="blinktext();">. This script only affects elements with the id "announcement." Place your blinking text inside any element and give it that id. For example, type <p id="announcement">Blinking text here.</p> or <div id="announcement">Blinking text here.</div>. You can rename this anything you like. Just make sure to use the same word in the script and the element id. The number "1000" in the script sets the delay between blinks. This is in microseconds, so a value of 1000 makes the text blink once per second. Change this to a lower number to speed up the blinking, or a higher number to slow it down. The actual delay probably won't match this value perfectly. It tends to be slightly shorter, but can take longer if your browser is busy with other requests.
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One-sentence summary -- Insert a blink script into the head of your HTML document. Insert the command to load your script. Define your blinking text as an announcement. Adjust the script.

Problem: Article: You can shrink any of your existing drives to convert the free space on them into a new partition. This can be useful if you have a lot of free space on a drive and want to create a dedicated drive for specific files, such as media. Press ⊞ Win+R and type diskmgmt.msc to quickly launch the Disk Management utility. You can also right-click the Start button in Windows 8 and 10 to select Disk Management from the menu. You can shrink any partition that has some free space. You'll likely want to choose one that you can at least get several GB out of to make your new partition useful. Make sure to leave enough space for the existing partition, especially if it is your boot partition. Windows performs best when it has at least 20% of the partition free. This will open a new window after Disk Management determines how much space is available to create a new partition out of. The window will display how much space is available to shrink the existing drive in megabytes (MB). 1024MB is equal to a single gigabyte (GB). You'll need to enter in the size you want to shrink the drive by (creating a new partition that size). Click "Shrink" to carve out the space that you specified in the existing drive. It will appear in Disk Management as Unallocated space on the same drive as the old partition. Right-click on the unallocated space and select "New simple volume". This will start the Simple Volume Wizard. You'll be able to select how much of the Unallocated space you want to use for the new partition. You'll also be assigning a drive letter. During the wizard, you'll be prompted to format the partition. You can format it with a file system now, or do it later by performing the steps in the previous method.
Summary:
Open the Disk Management utility. Select the partition that you want to shrink. Right-click the partition and select "Shrink volume". Enter in the size of your new partition. Start the shrinking process. Create a partition. Follow the prompts to create the partition. Format the new partition.