[ww-bugs] Bug 3299: New: Question asks for f but answer is programmed as df

[bugzilla-daemon at webwork.maa.org]

http://bugs.webwork.maa.org/show_bug.cgi?id=3299

           Summary: Question asks for f but answer is programmed as df
           Product: Problem libraries
           Version: unspecified
          Platform: PC
               URL: Library/Rochester/setDerivatives9Approximations/c2s9p1
                    0_mo.pg
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P5
         Component: Library (OPL)
        AssignedTo: jj at asu.edu
        ReportedBy: jeremy.sylvestre at ualberta.ca
        Web browser ---
           version:


This question asks students to estimate f(2 + 1/60) but the answer in the code
is programmed to be just the differential df over the interval [2,2+1/60].

You could either change the wording from

If there is $c grams of solid at time \(t=2\) estimate the amount of solid 1
second later.

to

If there is $c grams of solid at time \(t=2\) estimate the change in the amount
of solid 1 second later.

OR

you could just change the answer from

$f = Compute("$a*$c*($b + $c)(1/60)");

to

$f = Compute("$c + $a*$c*($b + $c)(1/60)");

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