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How old is your kid?
If he/she is primary school pupil then the sign is just a incorrectly rendered multiplication sign.
There is absolutely nothing else you can do with c ^ (12/5) and c ^ (3/5) but to multiply them.
And solutions are
13) c ^ 3
14) x ^ (21/4) (unless part of formula is missing on right)
Or the question was just for laughs ...
If you know the name of the book and the page number, then you might be able to find an errata. Most printed text books have pages and pages of errata.
If they do not let you bring the books home, then there is probably an online version with some lame password like schooldistrictname2015. Hopefully, the online version would be fixed but you might still need to find an errata.
It will if the cost of Xamarin comes down to a reasonable level as a result - which I'd imagine it could. That could really boost usage of .NET (ish) into the mobile market which presumably is why MS are buying them in the first place. Either that or to crush them utterly - difficult to tell with MS sometimes...
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
Yeah, my Mint Linux experience was good too. The only thing that wasn't working after the install was the printer. Just had to go to the Brother's website, download and install.
So far (about 3 months now) everything is working great. It helps that I pretty much just use open source/cross platform applications for my normal computing needs (Firefox, Thunderbird, Octave, Libre Office, g++, etc). I really like being in control of my own freaking computer!
I haven't touched it in over 5 years. Once you get over the novelty aspect and need to do something simple like install a driver, you realize it's just not worth it. OK, I've gotten it to boot, now what do I do with it? Install Wine so I can run Windows apps?
Ahhh, takes me back to my first Linux experience. Lost an entire Sunday trying to install the bleeding thing. This was when I was at uni (Dial Up internet, so couldn't download a better installer with ease). Personally why the Linux desktop, it owns the embedded world.