This first question is just an exercise in entering answers into WeBWorK. It also gives you an opportunity to experiment with entering different arithmetic and algebraic expressions into WeBWorK and seeing what WeBWorK really thinks you are doing (as opposed to what you believe it should think).
Notice the buttons on this page and try them out before moving to the next problem. Use the "Back" Button on your browser to get back here when needed.

"Prob. List" gets you back to the list of all problems in this set.
"Next" gets you to the next question in this set.
"Submit Answer" submits your answer as you might expect, but there may be other ways to do so. Specifically, in this problem, there is only one question. In that case you can submit your answer by typing it into the answer window and then pressing "Return" (or "Enter") on your keyboard. But even in this case, you can also type the answer and click on the "submit" button. There is no harm in submitting an answer even if you are not quite sure that it's correct, since if it is not you have an unlimited number of additional tries. On the other hand, it is usually more efficient to print your own private problems set, work out the answers in a quiet environment like your home, and then sit down in front of a computer and enter your answers. If some are wrong you can try to fix them right at the computer, or you may want to go back and work on them quietly elsewhere before returning to the computer.
Pressing on the "Preview Answer" Button makes WeBWorK display what it thinks you entered in the answer window. After using "Preview" you can modify your answer and use a "Preview Again" button.
"images" denotes the ordinary display mode on your workstation.
"Logout" terminates this WeBWorK session for you. You can of course log back in and continue.
"Feedback" enables you to send a message to your instructor, and the WeBWorK assistants. If you use this way of sending e-mail the recipients receive information about your WeBWorK state, in addition to your actual message.
The "Help" Button transports you to an official WeBWorK help page that has a more information than this first problem.
"Problem Sets" transports you back to the page where you can select a certain problem set. When you do this particular problem in this first set, there is only one set, but eventually there will be 13 of them.
For all problems in this course you will be able to see the Answers to the problems after the due date . Go to a problem, click on "show correct answers", and then click on "submit answer". You can also download and print a hard copy with the answers showing. These answers are the precise strings against which WeBWorK compares your answer. If the answer is an algebraic expression your answer needs to be equivalent to the WeBWorK answer, but it may be in a different form. For example if WeBWorK thinks the answer is $2*a$, it is OK for you to type $a+a$ instead. If WeBWorK expects a numerical answer then you can usually enter it as an arithmetic expression (like $1/7$ instead of $.142857$), and usually WeBWorK will expect your answer to be within one tenth of one percent of what it thinks the answer is.
Most of the problems (including this one) in this course will also have solutions attached that you can see after the due date by clicking on "show solutions" followed by "submit answers". The solutions are text typed by your instructor that gives more information than the "answers", and in particular often explains how the answers can be obtained.

Now for the meat of this problem. Notice that the answer window is extra large so you can try the things suggested above.
Type the number 3 here:
.
Try entering other expressions and use the preview button to see what WeBWorK thinks you entered. Return to this problem to try out things when you get stuck somewhere else.
Here are some good examples to try. Check them all out using the Preview button. (In later questions on this set you will get to use what you learn here.) Never mind that you may have already answered the correct answer 3. Once you get credit for an answer it won't be taken away by trying other answers.
a/2b ~versus~ a/2/b ~versus~ a/(2b)
a/b+c ~versus~ a/(b+c)
a+b**2 ~versus~ (a+b)**2
sqrt a+b ~versus~ sqrt(a+b)
4/3 pi r**2 ~versus~ (4/3) pi r**2 (In other words, if you are not sure use parentheses freely.) Note: WeBWorK will not usually let you enter algebraic expressions when the answer is a number, and it will only let you use certain variables when the answer is in fact an algebraic expression. So the above window, and the opportunity for experimentation that it offers is unique. Make good use of it!
Presumably this has been your first encounter with WeBWorK. Come back here to try things out and to refresh your memory if you get stuck somewhere down the line.