ok folks, the first thing to note here is that this problem is a (poorly written) knock-off of the following GMAT PREP question:
https://www.beatthegmat.com/sc-with-surf ... 43734.html
a couple of things to note:
* apparently (as evidenced by that problem), "estimated at" is ok.
the difference may be what comes next -- og13 #30 follows "at" with something that isn't a noun, whereas the GPREP problem follows it with a noun. (but, then again, it may not be; there's another problem somewhere in the OG that uses "dated at", followed by a non-noun.)
in any case, gmac has distanced itself from testing such idioms (and with good reason), so this isn't worth worrying about.
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ceilidh.erickson wrote:This is a run-on sentence! It has two independent clauses incorrectly joined by a comma.
yep
I strongly recommend that you stop studying from this source.
i second this notion. when you're dealing with a source that contains errors
even when mimicking official problems ... well, as my uncle used to say, that's all kinds of ain't good.
Ron has been teaching various standardized tests for 20 years.
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Potete chiedere domande a Ron in italiano
On peut poser des questions à Ron en français
Voit esittää kysymyksiä Ron:lle myös suomeksi
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Yves Saint-Laurent
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