For your first question. The two columns you are looking at, Entered and Answer Preview give what the student entered and a type set version of the answer which is most useful for formulas, etc.

For this problem, the third answer is indeed incorrect. The correct answer is .2513 not 2153. As a prof you can view the correct answers anytime. Students can see them only after the answer date.

For your second question, in problems you will see things like

$a= random(5,10,1);

i.e. let $a be a random number from 5 to 10 with stepsize 1.

If you replace this by, e.g.

#$a= random(5,10,1);

$a= 7;

there will be no radomization for $a. You will have to do this for all random variables. Note that # means every that follows on that line is a comment.

Good luck with WeBWorK.

Arnie