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# ACC QAS W/S #4 Key

ACC QAS W/S #4 Key

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## ACC QAS W/S #4 Key

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1. ACCUPLACER® Module #2 - QAS Worksheet #4 - Key 1

2. Module #2 Worksheet #4 1. D: The slope is given by the change in y divided by the change in x. The change in y is 2 - 9 = 2, and the change in x is 0 - (-4) = 4. The slope is 2/4 = 1/2. 2. B: The number of ways to order n objects is given by the product 3! 2! 1! ( )( )( ) 1!2! 1!1! 1!1! denominator will cancel one another, with a result of 3! = 3 x 2 x 1 = 6. 3. C: Jane will be choosing four employees out of a set of six applicants, so this will be given by the choice function. The following equation shows the choice function worked out: 6! 6! ( ) 4!(6 4)! 4!(2)!  4. B: Because this isn't a right triangle, SOH-CAH-TOA can't be used. However, the law of cosines can be used. Therefore: 2 2 2 2 2 cos 19 26 c a b ab c      NAME: _____KEY_________________  1 1 1 n n n . ( )( )....( ) 1  3 1 2 1 1 1 This is: . 1! is just 1, and the 2! in the numerator and x x 6 5 4 3 2 1 (4 3 2 1)(2 1) x x x 6 5 2 x x x x x x      6 4 15 x   2 0 2(19)(26)cos42 302.773 Taking the square root and rounding to the nearest tenth results in c = 17.4. 1 4 f 1. 4 f 1). 36  y 9 y x 2 2 5. D: A parabola of the form has a focus (0, f). Because , set x 1. 36   f  9 Solving this equation results in Therefore, the coordinates of (0, the focus are 2

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