This problem demonstrates various WeBWorK procedures for dealing with numerical answers. In particular, by entering syntactically incorrect answers, you can see the error messages generated by WeBWorK. Note that exponentiation can be denoted by ** or $\hat{}$ . See Answer Evaluators for documentation on these procedures.

Enter the number 52.1 . You are only allowed to enter a number (e.g. 52.1, 5.21E1, 521E-1, etc.)
This uses strict_num_cmp


Enter the number 52.1 again. This time you can enter a number or fraction (e.g. 52.1, 521/10 5.21/.1 etc.)
This uses frac_num_cmp


Enter the number 52.1 a third time. This time you can enter any arithmetic expression equaling 52.1 (e.g. 52.1, 100/2+3-.9, (5*10**2+21)/10, etc.)
This uses arith_num_cmp


Finally enter the number 52.1 a fourth time. Now you can enter any expression involving elementary functions which equals 52.1 (e.g. 52.1, 50.1+ln(e**2), tan(pi/4) + ln(exp(2)) + cosh(0) -1.9 + arcsin(0) + 5*sqrt(10**2), etc.). See Available Functions for details on entering expressions involving elementary functions.
This uses std_num_cmp

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