Pre-Calculus Homework Solutions 21

# Pre-Calculus - Chapter 1 Standardized Test Practice y 2x 3 y 2(2 3 or 7 The solution is(2 7 Pages 5859 12 1 C there are 15 hours between 7 A.M and

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Chapter 1 Standardized Test Practice Pages 58–59 1. C; there are 15 hours between 7 A . M .and 10 P . M ., so there are 15 ? 60 5 900 minutes during that time. Then Juanita blinks 11 ? 900 or 9900 times during the time she is awake. 2. A 3. B; } 2 x 2 1 2 x 1 1 2 x 4 1 16 } 5 ¬ } 2( x 2 2( 1 x 1 6 x 2 1 ) 8) } 5 ¬ } 2( x 2 1 ( x 4 1 )( x 2 1 ) 2) } 5 ¬ x 1 4 4. A; three noncollinear points determine a plane, so if the two planes are distinct, their intersection is not a plane. Two planes intersect in only one line. 5. B; 1 fathom 5 6 feet so 55 fathoms 5 55(6) or 330 feet, which is 110 yards. 6. C; use the Pythagorean Theorem, where x is the height up the side of the house that the ladder reaches. (18) 2 5 ¬ (6) 2 1 x 2 324 5 ¬ 36 1 x 2 288 5 ¬ x 2 17.0 < ¬ x 7. C; m / ABD 5 ¬ m / CBD 2 x 1 14 5 ¬ 5 x 2 10 2 x 1 14 1 10 5 ¬ 5 x 2 10 1 10 2 x 1 24 5 ¬ 5 x 2 x 1 24 2 2 x 5 ¬ 5 x 2 2 x 24 5 ¬ 3 x 8 5 ¬ x m / ABD 5 2 x 1 14 5 2(8) 1 14 5 30 8. D; let x be the measure of /
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## This note was uploaded on 12/19/2011 for the course MAC 1140 taught by Professor Dr.zhan during the Fall '10 term at UNF.

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