This document contains detailed answer explanations to every question from the December 14, 2013 ACT, Form 71E. Many Mathematics and English explanations also link to content pages that explain the relevant grammatical and mathematical concepts in greater detail. Please note that this document contains the explanations only, and does not provide the test questions themselves; it is a tool intended for use with a copy of your test that you purchased from the ACT via the Test Information Release (TIR). The following are sample explanations:
1) B) “Though a one-time event” is a nonessential element of the sentence, meaning that the sentence would still make sense if this element were removed. Therefore, it is necessary to separate this element with commas before and after it. It is important to pay attention to commas in the non-underlined portion of the sentence, as these commas can provide valuable hints. In this case, the comma after “event” would make no sense unless it was the second of two commas to offset a nonessential. See comma use.
1) C) In unsimplified terms, the ratio is 42:47. Simplifying this ratio is just like simplifying a fraction; divide both sides by 7 to get a ratio of 6:7. If you answered E, you probably did everything correct but simply got things reversed, which is something to be very careful of on any ratio problem. See ratios and proportions.
1) D) As described in lines 23-29, Orville had abandoned the stopped train to walk because he was tired of waiting. It is therefore ironic when he is passed by the train he did not want to wait for.
1) A) The positive +CG strokes are represented by the y-value on the bottom graph of Figure 1. Since the bars that represent the number of +CG strokes during the 5 minute interval are steadily increasing in height from 1:25 to 1:55, the number of +CG strokes in each 5 minute interval increased during this time. Continue reading
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