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This is most likely a Unicode error. I think the "vertically middle dot" was meant to be printed out. Do you have other exercises you could relate to ?
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I think that's the "turn around and ask the smart kid hiding in the back row for the answer" symbol.
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If the symbol is a typo for multiplication #13 become c^3, #14 not so clean x^(21/4)
You would have to figure out what the symbol is a substitute for.
Brent
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Hey!
Thirty six days to the first of April!
(no?)
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This might not help at all but makes you feel less guilty. I work now 20 years in Reinsurance and develop pricing tool, have a degree in Electronics and Economics. My work colleagues, who are by nature, all mathematicians and specialist in the field of actuarial science. Some have PHD's and other degrees I cannot even pronounce. However, I haven't seen this symbol in my entire career, and that's frustrating!
Could it mean to find a divisor to get from c^12/5 to c^3/5? Have a look here on Wolfram https://www.wolframalpha.com/input/?i=(c%5E(12%2F5))+%2F+(c%5E(9%2F5))
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I haven't taken a math class in 30 years, but 30 yrs ago, I took a lot of them. Even so, the algebra problems your kid is doing hasn't changed much since the 17th century.
Find the earliest reference in the book, or perhaps even inside the cover. I strongly suspect the author has minted his own notation. In context, it looks like you're supposed to replace the squiggly with another standard symbol, such as < etc.
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My approach would be:
Khan Academy .org
Start with the book sections you child is covering.
Use the contextual clues from the types of problems being solved.
(This would be the Chapter topic, and the section topics, and problem heading (solve for x))
Start there with a broad scan.
At the very top of the site is a search. I usually can find anything a student is working on.
Also helps to know know what level of algebra.
Finally, in most math books these days, even the ONLINE versions, the symbols are introduced in the sections the kids never read at the front of the section. Usually as an EXAMPLE problem!
HTH
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Your machine probably just doesn't support the original font, so it produced this other character from whatever font it could provide. Check the course requirements for which font you need to install.
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From the context I assume it represents 'the reciprocal of'. So with the implied multiply operator we'd get
13) 4
14) 1 / 3x^2
But what do I know - I'm 65!
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Oh, now that's an idea. Thanks. 
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It may be a good idea but my answers are wrong as I mis-read the two questions. If I'm right about the reciprocals bit then the correct answers I reckon are:
13) c^4 14) 1 / x^6
(I'm happy to sit at the back of the class)
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If your kid's been out, how did he get the homework? Did he download it from a webpage or some such? If so, it might be a font mismatch between the teacher's computer and yours.
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I have multiple degrees in abstract math (functional analysis mainly) and I have never seen that symbol used in English, German or Russian texts. Must be something new.....
Using the latest technology to create tomorrows problems today.
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Maybe it's a capital G.
tnich
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I've asked some maths experts and they've requested more information. Do you have earlier pages in the chapter you could post? So far nobody has seen this symbol used in this way.
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Nope, this is just a worksheet we think the teacher downloaded from the 'Net. So it is likely a mis-translation of some sort.
Interestingly, the next day the kid brought home another worksheet and my wife was able to find it -- with the answers. 
We're not impressed by the quality of the "teaching" that goes on now.
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If it's not too much trouble, what were the answers? Was it a multiplication symbol as suspected?
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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 ...
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It's supposed to be algebra 1, 9th grade. And it's likely supposed to be multiplication.
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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.
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Kinda expected. This will be interesting.
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Finally!!!! 
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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...
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Didn't go very well.
Installed Ubuntu in VMWare player, worked fine.
Downloaded some updates, restarted, works not so fine.
It hanged at startup on "Stopping Restore Sound Card State".
Removed the virtual sound card and it now hangs on "Stopping System V runlevel compatibility".
I guess the same goes for Linux as for Windows, don't install updates 
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This _IS_ the _YEAR_ of the LINUX DESKTOP!!!!!
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