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# Answer Explanations for: ACT April 2011, Form 67F

This document contains detailed answer explanations to every question from the April 9, 2011 ACT, Form 67F. 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:

English
1) D) “Facing… course” represents a nonessential element of this sentence, because the sentence would still make sense if it were removed. Therefore, it is necessary to offset this element from the rest of the sentence with a comma before it and a comma after it. The other answer choices, which involve the use of a period or a semicolon, cannot work because periods and semicolons are used in between two independent clauses, and the first part of this sentence is not an independent clause because it is incapable of standing on its own. See comma use.

Mathematics
2) G) The most efficient way of taking 20% off \$58.95 is to multiply \$58.95 by .8, or 80%. This method works because if 20% is taken off the price, the new price represents 80% of the original price. \$58.95 • .8 = \$47.16. Alternatively, you could have done this problem by finding 20% of \$58.95 and subtracting this number from \$58.95. If you answered K, you likely attempted to do the problem this way but simply found 20% of \$58.95 and put that is your answer, forgetting to subtract this number from the \$58.95. You should have been able to catch yourself if you put this, since the answer really does not make sense for a 20% discount. See percentages.