A-SSE.B.3.c

[lhwalker]

Besides the example in the Standard itself, this is the only example in Illustrative Mathematics: https://www.illustrativemathematics.org/illustrations/1305

I’m wondering if these aren’t a bit much for Algebra I students just beginning to understand rational exponents. Am I being a wimp?

[lhwalker]

The answer to my questions is no, but I skim too fast. I see that instruction in exponents in the Common Core took a huge shift toward relevance instead of (xy)^2z^3(x^2)y. That makes perfect sense!

[csteadman]

I am still struggling with this standard. Mostly with the financial context. From the example in the standard raising 1.15^(1/12) reveals a very similar rate as using the compounding formula, (1+ .15/12). When is it more appropriate to use one over the other? Is one more right from a financial aspect? Is this in the APY vs. APR category? I may be over thinking it, but it seems like a tough difference to assess.

[Bill McCallum]

The diffence is certainly small, but small differences in effective interest rates can add up over time: see http://www.investopedia.com/articles/basics/04/102904.asp.

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