--- loncom/homework/caparesponse/caparesponse.pm	2018/09/13 17:00:05	1.259
+++ loncom/homework/caparesponse/caparesponse.pm	2020/12/04 22:19:19	1.261
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # caparesponse definition
 #
-# $Id: caparesponse.pm,v 1.259 2018/09/13 17:00:05 raeburn Exp $
+# $Id: caparesponse.pm,v 1.261 2020/12/04 22:19:19 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -760,7 +760,11 @@ sub end_numericalresponse {
 		my $ans=$answers[$i];
 		my $fmt=$formats[0];
 		if (@formats && $#formats) {$fmt=$formats[$i];}
-		foreach my $element (@$ans) {		    
+		my @answers;
+		if (ref($ans) eq 'ARRAY') {
+		    @answers = (@{$ans});
+		}
+		foreach my $element (@answers) {		    
 		    if ($fmt && $tag eq 'numericalresponse') {
 			$fmt=~s/e/E/g;
 			if ($unit=~/\$/) { $fmt="\$".$fmt; $unit=~s/\$//g; }
@@ -770,7 +774,7 @@ sub end_numericalresponse {
 			if ($fmt=~/\$/ && !$needsdollar) { $element=~s/\$//; }
 		    }
 		}
-		push(@fmt_ans,join(',',@$ans));
+		push(@fmt_ans,join(',',@answers));
 	    }
 	    my $response=\@fmt_ans;
 
@@ -1061,7 +1065,12 @@ sub make_numerical_bubbles {
                      &Math::Random::random_uniform_integer(1,1,10);
     }
     for ($ind=0;$ind<$number_of_bubbles;$ind++) {
-	$bubble_values[$ind] = $answerfactor*($factor**($power-$powers[$#powers-$ind]));
+	my $exponent = $power-$powers[$#powers-$ind];
+	if ($exponent == 0) {
+	    $bubble_values[$ind] = $answerfactor;
+	} else { 
+	    $bubble_values[$ind] = $answerfactor*($factor**$exponent);
+	}
 	$bubble_display[$ind] = &format_number($bubble_values[$ind],
 					       $format,$target,$safeeval);
     }