Formal salutation to a group I need to write a formal letter to a group of people consisting of two females and two males. One of the females is unmarried.   "Dear Sirs" must be out of the question. "Dear Madam / Miss / Sirs" also doesn't sound right; "dear all", "hello" or "hi" all sound to informal. As there are four of them I thought about "Dear Group", but I'm afraid some may take this the wrong way. Using their names as in "Dear Ms Black, Ms Brown, Mr Green and Mr White" could also be a possibility I guess, but it doesn't sound good to me either. Not being a native English speaker only makes finding a good solution more difficult.  Good ideas, anyone?
"Dear Sir or Madam" versus "To whom it may concern" When is it appropriate to use the terms Dear Sir or Madam and To whom it may concern?  The rules I was taught state that Dear Sir or Madam should be used when you're writing a letter to a person about something that person has direct involvement in (e.g. returning a defective product to a customer service department).  By the same rules, To whom it may concern would be used for situations in which the recipient is a third party to the topic of the letter (e.g. regarding a letter of reference or recommendation).  Was I taught correctly?  Is the rule actually something else?  Or is this one of those situations where many people have an opinion but there is no real rule?
If $a, b, c$ be distinct reals such that $$a + \frac1b = b + \frac1c = c + \frac1a$$ how do I find the value of $abc$?  The answer says $1$, but I am not sure how to derive it. Is it two-third or two-thirds? Is it two-third or two-thirds? If both are correct, how does their usage differ? If I've decided to update my SE avatar (in any of the various ways well described in the answer to this ), am I able to return to either the original stock image or previous avatar images I have used? Why is Excel truncating my 16-digit numbers? If I type in a 16 digit number (format: number, no decimals) it changes the number on me. Example: 1234567812345678 changes the view to 1234567812345670.    If I type it in as a general format it changes the numbers above so it displays 1.23457E+15 but if you click on the cell, the display shows the last digit as a 0 instead of an 8 once again.   I opened the file on a different computer and same issue now with it.  I have changed the auto correction and auto formatting all to no avail.  Help! Multiplying two dimensional data by a constant I'm looking for a command (or command line program) to toggle (disable/enable) internet access to the outside world in Windows XP machines. It should temporarily block internet access but leave the LAN working.   I looked for ways to change the DNS, but browsers like Chrome keep their own cache. The machines are configured via DHCP. Shouldn't there be a way to prevent automatic awarding of a bounty? For example, if someone provides an answer that sounds good but is totally wrong, it may happen that it gets a score of +2, but doesn't deserve the bounty. If no one else answers, half the bounty will automatically go to this person. Automatic awarding is good if an inactive user offers a bounty, but I think there should be a button that basically means "I know the bounty should now be awarded, but I have read the answers and none of them deserve the bounty".  The button should obviously not refund the bounty, just let it go to /dev/null instead of awarding it to someone who doesn't deserve it. Ubuntu 20.04 Font and UI elements too big on login I'm running Ubuntu 20.04 on an ASUS X99-E-10G WS w/ an NVIDIA 1080Ti and an LG 4k 32&quot; monitor which persistently gets recognized as 27&quot;. When I log in, the text of certain UI elements is ~2x the normal size. After I go to settings/universal access and turn large text on and then off again, everything is the normal size I expect. Screenshot after logging in  After turning &quot;large text&quot; on  After turning &quot;large text&quot; off  How do I get the conditions I have after cycling the &quot;large text&quot; feature to be present immediately after booting? I have the 440 version of NVIDIA's drivers installed. Check to see if an email is already in the database using prepared statements Vector. Properties It is given in a question that $\vec x+\vec a=(\vec a\cdot \vec x)\vec b$ and it is stated that $\vec a$, $\vec b$ and $\vec x$ are vectors.  It is also stated that $\vec a\cdot \vec b\ne 1$.  The question asks to express $\vec x$ in term $\vec a$ and $\vec b$.  How do you this? Whenever I try to Get then Install any app from the App Store, I get this message:     We could not complete your purchase.  cancelled   I did some searching online, but barely found any useful hits. What is this about?! How can we read and write values in a multidimensional array in verilog, i had read in  regarding different operations that can be done on multidimensional array. like if there is a part of code like this  input [15:0] me;  reg [15:0] p_array [7:0]; reg abc_pqr [2:0];  abc_pqr[0] &lt;= me[0]; abc_pqr[1] &lt;= me[1]; abc_pqr[2] &lt;= me[1]; p_array[abc_pqr[0]] &lt;= me[0]; p_array[abc_pqr[1]] &lt;= me[1]; p_array[abc_pqr[2]] &lt;= me[2];   so is this code will work and will not produce any error?  What is the difference between these two while assigning value  "&lt;=" and "=", i had seen "&lt;=" in most of the places during passing values. Can you re-equip equipment to the same creature? I am already dual booting windows 10 with Linux Mint, and I am trying to replace Mint with Ubuntu. I have already created a bootable usb for Ubuntu.  When I try to install Ubuntu, I don't see any option to install Ubuntu alongside windows 10. Rather, I see "install Ubuntu alongside Linux Mint". I didn't find any option to keep my windows 10. How can I replace Mint with Ubuntu in this dual boot system? Mint is installed on an ext4 partition and I have a Linux swap partition. Why don't files from Xbox 360 show up when USB drive is plugged into computer? I'm using a Lexar JumpDrive S73 32GB USB flash drive. I've configured it on my Xbox 360 and got a message saying it's compatible and meets the standards, but when I plug in it in my computer no files show up, even in Horizon.   After the driver was installed, both the USB mass storage and Lexar JumpDrive USB device were ready to use (installed properly), but it said no driver found for Xbox 360.    I tried looking for some sort of driver (which sounds silly) but I couldn't find anything.  I'm attempting to mod Minecraft on my Xbox and I don't want to buy another USB. can't send email to addresses at my own domain What is the difference between equation and formula? Sometimes equation and formula are used interchangeably, but I was wondering if there is a difference.  For example, suppose we can calculate a car's fuel efficiency as:  mpg = distance traveled in miles / the fuel used in a gallon   Is that an equation or formula? How do I check if an object has a specific property in JavaScript? How do I check if an object has a specific property in JavaScript?  Consider:  x = {'key': 1}; if ( x.hasOwnProperty('key') ) {     //Do this }   Is that the best way to do it? In a particular textbook, the work function of a metal (in the context of the photoelectric effect) is defined as:     the minimum amount of energy necessary to remove a free electron from the surface of the metal   This sounds similar to ionisation energy, which is:     the amount of energy required to remove an electron from an atom or molecule in the gaseous state   These two energies are generally different. For instance, Copper has a work function of about 4.7eV but has a higher ionisation energy of about 746kJ mol-1 or 7.7eV.  I've sort of figured it's because the work function deals with free electrons whilst ionisation is done with a valence electron still bound within the atom. Is the difference due to the energy required to overcome the attraction of the positive nucleus? CSV rows to Polyline with OGR I'm not sure if I can complete this operation in one step - but someone might be able to help me.  My input file is a csv file with PointID, x, y, z and LineID columns.  I'm looking to combine all rows with the same LineID into Polyline25D using ogr2ogr with a virtual datasource (VRT file).  I can get a MultiPoint output, but can't work out how to combine multiple rows (if it's at all possible).   Alternatively, could someone help me with a python script to combine the x, y, z fields into WKT?  Input Example :  pointid y   x   z   lineid 1   320589.01   1815258.73  423.78  1 2   320573.49   1815256.71  425.04  1 3   320557.42   1815252.40  425.86  1 4   320541.64   1815248.71  426.19  1 5   320529.37   1815247.01  427.18  1 1   320588.78   1815259.35  423.43  2 2   320573.06   1815257.09  424.66  2 3   320557.00   1815253.09  425.06  2 4   320541.79   1815249.54  425.78  2 5   320529.14   1815247.74  426.22  2 6   320516.78   1815245.02  426.84  2 1   320588.62   1815260.10  423.44  3 2   320572.59   1815258.42  424.65  3 3   320556.21   1815255.29  425.13  3 4   320540.73   1815252.19  425.80  3 5   320529.02   1815248.37  426.20  3