Snakes require outside sources of heat because they are cold-blooded, meaning they can’t generate their own heat. An under tank heater that spans 1/3 of the tank’s floor is ideal. Ceramic heat emitters are good for extra heat. The warm side temperature should be about 85 degrees Fahrenheit. Corn snakes should have a warm side and a cool side to their tanks so they can move around to warm up or cool down depending on their needs. The warm side is the one with the heat lamp or heater. The warm side should be around 80–85 °F (27–29 °C), and the cool side should be about 75–80 °F (24–27 °C).  Place the under-the-tank heater on the side of the tank that will be the warm side. Make sure it doesn’t take up more than half the enclosure. Use a thermostat to regulate the temperatures on each side. Check each side with a digital thermometer each day by placing the thermometer into the substrate. For your corn snake to be at their optimal health, they should have daily light and darkness. Indirect light from a window is sufficient. If this is unavailable LED or UVB (beneficial but not completely necessary) will suffice.   Place the light on the warm side of the vivarium, making sure the cool side has less light, providing a “shaded” area away from the “sunny” area. The snake should have 10 to 12 hours of light each day. Vivariums should be placed in an area or room that is basically temperature controlled. They should not be near drafts or vents that can blow air on them, and they should not be near heaters.  You should also not place the vivarium near any windows or in areas that get direct sunlight. This can also affect the temperature inside the vivarium. The vivarium should have some form of ventilation but keep in mind that too much air flow can change the temperature of the vivarium.
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One-sentence summary -- Provide a heat source. Keep the temperature regulated. Provide a daily cycle of light and dark. Place the vivarium away from anything that will affect the temperature.

Q: Generally, if you are pricing a bond, it is because you are considering buying or selling it. In either case, there are certain terms of the bond that you will know. For example, a bond might be offered as a $1,000 bond, to be paid in ten years, with a coupon rate of 10% and a required yield of 12%. You will use these data to calculate the present value of the bond, incorporating all future payments. Working with the example given above, the face value of the bond is $1,000. The term is ten years. The coupon rate is given as 10%, and the yield is provided as 12%. If the seller of the bond does not provide all this information, then you should ask for it. A basic present-value formula will account for today’s value of money that is to be paid in the future. Because of interest rates, the money that you could hold today is generally considered more valuable than money that will be paid in the future. The present-value formula accounts for this difference. The basic present-value formula is Price=C/(1+i)+C/(1+i)2{\displaystyle Price=C/(1+i)+C/(1+i)^{2}} …+ C/(1+i)n+M/(1+i)n{\displaystyle C/(1+i)^{n}+M/(1+i)^{n}}. In this formula, the variables are assigned as follows:   C{\displaystyle C} is the amount of each coupon payment that you expect to receive.  i{\displaystyle i} is the interest rate  M{\displaystyle M} is the face value of the bond at maturity.  n{\displaystyle n} is the number of payment periods over the life of the bond. If you will expect two payments per year, which is standard, then a bond that matures in ten years will have 20 payment periods. Most bonds make coupon payments on a regular basis. This allows you to simplify the formula, to avoid an ambiguous added series. The revised formula may look slightly more complicated but is actually easier to apply. The revised annuity formula is:  Price=C∗(1−(1/(1+i)n)/i+M/(1+i)n{\displaystyle Price=C*(1-(1/(1+i)^{n})/i+M/(1+i)^{n}}. You need to apply the information that you know about the bond correctly in order for the formula to work. Use the example given above, of a $1,000 bond, to be paid in ten years, with a coupon rate of 10% and a required yield of 12%. With this information, the variables for the formula are as follows:   C{\displaystyle C} is the amount paid on each coupon. The coupon rate given of 10% is for the year, meaning that you will receive 10% of the face value of the bond, or $100. This is commonly paid semi-annually, so the value for C is half that, or 50.  i{\displaystyle i} is the interest rate given as the required yield of the bond. In this case, that is 12%. However, the interest rate given is for the year, but you will be calculating based on semi-annual payments, so use half that figure. The value of i{\displaystyle i} for your calculations should be 6%, which you will write as a decimal of 0.06.  n{\displaystyle n} is the number of payment periods over the life of the bond. If you are basing your calculation on semi-annual payments, for ten years, n{\displaystyle n} will be 20. Insert the values into the formula and find the value of the bond. In this example, applying the values to the formula results in the following: Price=50*(1-1/(1.06)^20)/0.06)+1000/(1.06)^20. Performing the calculations results in a bond price of $885.30. The calculated value of $885.30 is less than the face value of $1,000. This means that the bond should sell at a discount in order to attract investors. This discount is due to the fact that the coupon payments are only 10% while the required, advertised yield of the bond is 12%. You would expect to receive less in coupon payments than the promised yield of the bond. If the interest rate were to decrease, then the value of the bond would increase. Interest rates and bond values operate in an inverse manner.
A: Learn the details of the bond being offered. Understand the present-value formula. Revise the formula to account for annuity payments. Determine the variables to use in the formula. Calculate the bond’s current value. Understand the meaning of the bond price.

Article: Tap the Skype app icon, which resembles a white "S" on a blue background. If you aren't logged into Skype, you'll need to enter your email address (or phone number) and password before continuing. It's a person-shaped icon at the top of the screen. Doing so opens a list of your contacts. This option is at the bottom of the screen. Tapping it prompts a menu to open. It's in the menu. This opens a text box. Doing so searches Skype for your specified contact. Tap the name of a contact whom you want to add. It's a blue button in the middle of the page. This option is below the text box. Doing so sends an invitation for the person to join your contacts; if they accept, you'll see them online, and you'll be able to chat with them as you please. You can first edit the invitation message by typing your preferred message into the text box that appears. If your friend doesn't already have a Skype account, you can invite them to create one and join you on Skype by doing the following:  Tap the "Contacts" icon in the bottom-right. Tap Invite People to Skype. Select a contact method (e.g., your text messaging app or Gmail). Enter your friend's contact information (e.g., their phone number or email address). Tap the Send button or icon.
Question: What is a summary of what this article is about?
Open Skype. Tap the "Contacts" icon. Tap ＋. Tap Find people. Enter a name, email address, or phone number. Select a result. Tap Add to contacts. Tap Send. Invite a friend to join Skype.