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Math111i_GroupQuiz3_Solutions

Math111i_GroupQuiz3_Solutions - -4 1-2 by b = 1 = a-4 -2...

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Math 111I Sec 001 Group Quiz 3 Solutions Name Directions: Read each question carefully and answer in the space pro- vided. The use of calculators is allowed, but not necessary. There are 10 points possible. To receive partial credit on any problem work must be shown. 1. Pluto is approximately 4 . 6 × 10 9 miles from the sun. How many seconds does it take the light of the sun to reach pluto if light travels 1 . 86 × 10 5 miles per second? Solutions. We perform the computation for the conversion 4 . 6 × 10 9 mi. · 1s 1 . 86 × 10 5 mi. = 4 . 6 × 10 9 1 . 86 × 10 5 s = 2 . 47 × 10 4 s 2. Simplify the expression. Express your answer using only positive ex- ponents. a - 9 b 5 a - 5 b 5 - 2 Solutions. The solution follows as a - 9 b 5 a - 5 b 5 - 2 = ( a
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Unformatted text preview: -4 · 1)-2 by b = 1 = a (-4) · (-2) = a 8 . 3. Simplify the expression. Express your answer using only positive ex-ponents and evaluate whenever possible. ³ 2 x 3 y-2 ´-5 Math 111I Sec 001 Group Quiz 3 Solutions Solutions. The solution follows as ± 2 x 3 y-2 ²-5 = 1 (2 x 3 y-2 ) 5 = 1 2 5 ( x 3 ) 5 ( y-2 ) 5 = 1 32 x 15 y-10 = 1 32 x 15 (1 /y 10 = 1 32 x 15 · y 10 = y 10 32 x 15 . 4. Simplify the expression. 4 p 16 x-12 y 3 Solutions. The solution follows as 4 p 16 x-12 y 3 = ± 16 x-12 y 3 ² 1 / 4 = (16) 1 / 4 ( x-12 ) 1 / 4 ( y 3 ) 1 / 4 = 2 x-3 y 3 / 4 = 2 y 3 / 4 x 3 ....
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