Math_112_Fall_2010.jkovalsky.Lesson_02_-_Exponents

Math_112_Fall_2010.jkovalsky.Lesson_02_-_Exponents - 10 /...

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JORDAN KOVALSKY Math - 112 Spring 2010 WeBWorK Assignment Lesson 02 - Exponents Due Date: 09/10/2010 at 11:59pm CDT. The primary purpose of WeBWorK is to let you know that you are getting the correct answer or to alert you if you are making some kind of mistake. You can use the Feedback button on each problem page to send e-mail to the course instructors. 1. (1 pt) Use the properties of exponents to rewrite the given expression as a simple fraction with only positive exponents. ° p 9 z 4 p 2 z 8 ± 9 Correct Answers: zˆ108/(pˆ99) 2. (3 pts) Rewrite using fractional exponents. Simplify when possible. 3 19 = ² y 5 = 3 ² q 2 = 5 ² x 5 y 4 z 6 = ³ 5 mn ´ 4 = ³ 3 8 s 4 t 7 ´ 5 = Correct Answers: 19**(1/3) yˆ(5/2) qˆ(2/3) xˆ(5/5)*yˆ(4/5)*zˆ(6/5) 5ˆ(4/2)*mˆ(4/2)*nˆ(4/2) 32*sˆ(20/3)*tˆ(35/3) 3. (3 pts) Rewrite using only positive exponents. x 8 / 5 = ( 5 rs ) 8 / 5 = 1 y 5 / 7 = 4 9 c 9 / 7 = µ 1 99 4 / 9 = µ 1 76 3 / 2 = Correct Answers: 1/[xˆ(8/5)] 1/[5ˆ(8/5)*rˆ(8/5)*sˆ(8/5)] yˆ(5/7) 4*cˆ(9/7)/9 99ˆ(4/9) 76ˆ(3/2) 4. (3 pts) Rewrite using positive exponents. Simplify when possible. 7 5 / 4 = 78 13 / 7 78 3 / 7 = n 2 / 9 n 13 / 2 = µ z 12 / 13 13 / 11 = µ s 13 / 9 t 3 / 8
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Unformatted text preview: 10 / 13 = m 10 / 7 n 2 / 7 5 = Correct Answers: 7(5/4) 78(10/7) n(121/18) z(12/11) s(10/9)*t(15/52) m(50/7)*n(10/7) 5. (3 pts) Rewrite using fractional exponents. Simplify when possible. You may assume all variables are positive. 7 a 5 = 6 64 y 42 = x 4 y 6 = 10 1024 s 10 y 5 = 3 m 18 n 15 27 = 6 x 42 y 30 729 = Correct Answers: a(5/7) 2*y7 x2*y3 2*s1*y(1/2) m6*n5/3 x7*y5/3 6. (3 pts) Multiply and simplify. Do not multiply out any binomials. x 1 / 2 ( 3 x ) 1 / 5 = y 1 / 4 ( 2 y ) 1 / 2 = ( yx 2 ) 8 ( xy ) 5 = 1 ( x ( y + 4 ) 2 ) 3 ( x 2 ( y + 4 )) 5 = ( a 2 bc 3 ) 6 ( ab 2 c ) 6 = Correct Answers: 3(1/5)*x(7/10) 2(1/2)*y(6/8) x21*y13 x13*(y+4)11 a18*b18*c24 Generated by the WeBWorK system c WeBWorK Team, Department of Mathematics, University of Rochester 2...
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Math_112_Fall_2010.jkovalsky.Lesson_02_-_Exponents - 10 /...

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