You just confused me O.o
Intersection - AND - upside down U
Union - OR - U
<=, >= would make the line not broken (so full solid line)
<, > would make the line broken (or dashed)
Would you say it has been the best mistake? :D
I find out about this website through teachers O.o and friends :)
Teachers were like always saying "Don't go onto bored of studies" :D
-The one on comparing melting and boiling point of water to similar sized molecules (3/2.7)
-dunno
-1/1.2 dichotomus key
-dunno about practical
-3/5.4 and 3/5.7 (i think)
I think solution means answer to a problem, not actually making solutions