Update: Good news!!  On a lark I tried the missions one last time and after doing the skill I had exited on earlier, the missing skill finally popped in.  I guess they fixed the problem -- Thanks E...

1. Közösség
2. Technical Issues and Workarounds
3. Can't finish world of math.

Just delete the bogus skill.  KA deletes skills all the time.  And why was this skill added just before the take down of the Missions?  I was at 100% mastered before I happened to check the mission...

1. Közösség
2. Technical Issues and Workarounds
3. Can't finish world of math.

One place where one can see a minus sign used as a superscript is in chemistry where it denotes a negative charge on an ion. For example, a positive Sodium ion and a negative Chlorine ion can combi...

1. Közösség
2. Study Group
3. Negative or Minus?

Now that I'm using the new interface a bit more I really do not like it. Here's why: 1) the programming window and canvas no longer use the full width of the display. I looked at an old program of ...

1. Közösség
2. Computing Platform Community Discussions
3. Thank you beta testers!

The answer provided a couple of days ago is quite correct. I just wanted to add that the problem appears to be leading you to recognize the common factor in "telescoping" functions. In general th...

1. Közösség
2. Study Group
3. Calculus Limits