If you're picking a tablecloth for an occasion, consider the nature of that occasion. Depending on the event type, there should be different levels of drop from the edge of the table to the bottom of the tablecloth. For a formal occasion, such as a wedding, you want a longer drop. Have about 15 inches from the edge of the table to the bottom of the tablecloth. For a casual occasion, like a low-key birthday party, you do not need as long of a drop. Aim for a 6-to-8 inch drop from the edge of the table to the bottom of the tablecloth. There is a simple calculation you can use to determine the measurements of your tablecloth. To start, you'll need to know the measurements of your table. For a rectangular or square-shaped table, use a measuring tape to measure your table's length and width. For a round table, you'll need to measure the diameter of your table. A diameter is the straight line going through the center of a circle. If you have a rectangular table, you'll need to know your desired drop. Remember, this depends on the type of event you're planning. To start, add twice the desired drop to both the length and width of the table. For example, say your table is 40 inches wide and 70 inches long. You want a 6-inch drop. You would add 12 to 40, to get 52. You would then add 12 to 70, to get 82. The resulting values are the dimensions of the tablecloth you should aim to purchase. In our above example, you should look for a tablecloth that is 52 X 82 inches. Calculating the dimensions of a round table is somewhat simpler. To figure out your length, you simply add twice your desired drop by your table's diameter. Say you want a 9-inch drop and your table has a diameter of 60 inches. You would add 18 to 60, getting 78. When purchasing a tablecloth, select a 78-inch round tablecloth.
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One-sentence summary -- Consider the occasion. Measure your table. Calculate the proper size for a square or rectangle table. Figure out the size for a round table.

For many pennies, one tablespoon (15 g) of salt in 1/2 cup (4 oz) of vinegar will get the job done. Stir the mixture to dissolve the salt. If you don't have vinegar, use lemon or even orange juice. Copper oxide (the gunk on your pennies) dissolves in weak acid, and that's just what all three of these liquids are.
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One-sentence summary -- Put 1 tsp (5 g) of salt into 1/4 c (2 oz) of vinegar.

If you're using a computer, navigate to Instagram's website. You'll have to log in with your Instagram account credentials if you aren't already logged in. To do this, tap or click the person icon; for mobile users, this is in the bottom right corner of the screen. If you're on a computer, you'll find this icon in the top right corner of the screen. This should be to the right of your profile image. While you can't force a follower to unfollow your profile, you can block them, thereby preventing them from being able to follow or view your account. This will take you to their profile, from which you can block them. This is in the top right corner of your screen (or to the right of their name on a computer). On Android, this menu is vertical rather than horizontal. On Instagram's site, this option says "Block this user". After selecting this option, Instagram will prompt you for confirmation. This will block your selected user; they will no longer be able to view your posts! Your blocked user will still be able to see your comments on other users' photos, and they will still be able to search for your account; however, they won't be able to access your account. You can view a list of your blocked users at any time by going into your settings menu and selecting the "Blocked Users" tab. If you would like to avoid unwanted followers in the future, you can make your account "Private"; doing so will allow you to approve any follower requests prior to users being able to view your account, which can also indirectly allow you to block users who already blocked you.
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One-sentence summary -- Tap the Instagram app to open Instagram. Access your profile page. Tap or click the "Followers" option. Review your list of followers. Click or tap a follower you want to delete. Tap the three-dot menu. Click or tap the "Block User" option. Click or tap "Yes, I'm sure". Repeat this process for every follower you wish to block.

Most universities will give you the option of either purchasing or renting academic regalia. For most people, renting academic regalia is more cost effective. However, if you are planning on becoming a professor, you might be expected to wear regalia as a faculty member at future events. In that case, purchasing your own regalia might be more efficient. Many universities have a specific provider of academic regalia and will not permit you to purchase regalia elsewhere. Other universities will allow you to buy or rent regalia from any provider you choose, or perhaps borrow regalia from an alumna. Always adhere to your specific school's regalia requirements so that you are allowed to participate fully in commencement exercises. Different types of degrees require varying academic hoods. To make sure that you acquire the correct kind of hood, inform your provider whether you are earning an Associate's degree, Bachelor's degree, Master's degree, or Doctoral degree. An Associate's degree hood is usually worn flat against the back like a cape or cowl. Note that Associate's hoods are not as commonly worn as graduate degree hoods--you might not need a hood to be a part of your regalia. A Bachelor's degree hood is 3 feet long and does not end in a sharp point. Note that Bachelor's hoods are not as commonly worn as graduate degree hoods--you might not need a hood to be a part of your regalia. A Master's degree hood is 3.5 feet long and comes to a point at the bottom. A Doctoral hood is the longest hood at 4 feet long. It has the sharpest point and also the largest trim of all hoods. If you're not using the university provider, it's important to double check that your regalia adheres to school standards. Make sure that your regalia provider has all the relevant institutional information so that you match your fellow graduates. American universities have a standard set of colors that indicate your field of study, rather than just your degree. These fields determine the color of the velvet trim that lines your hood. European universities are not standardized in the same way as American universities. Check with your institution to make sure you are purchasing the correct academic hood. Law students, for example, wear hoods trimmed in purple, while all Ph.D. students wear hoods trimmed in royal blue.
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One-sentence summary --
Purchase or rent academic regalia. Consult your university policies about regalia. Tell your regalia provider which degree you're earning. Provide your seller with the name of your institution. Inform your provider of your field.