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Quiz 5 - Fall 2006

# Quiz 5 - Fall 2006 - College Algebra Quiz#5 Name Fall 2006...

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Unformatted text preview: College Algebra Quiz #5 Name Fall 2006 Show all your work on this paper. Solutions without correct supporting work will not be accepted. All answers must be exact unless indicated otherwise. 1. Graph by h d: f (x) = 2”] + 3. Find the domain, range, all intercepts and all asymptotes. (5 points) (I s 1) x-imL: None/ HA: W3 2. Determine if f (x) = 2x3 + 5 has an in rse function. If so, ﬁnd it. Ifnot, explain why the inverse function doesnotexist. (6 points) [I] “b gum 1'!” 2rd“ w-LS’LS _ 1 3. Write 3lnx—Elny+ln(z+l) as asingle logari n . new + MM) 3.— 4. Solve : log2 x + log2(x + 2) = 3 (5 points) 5. Ten thousand dollars is invested in an account that pays 5% interest compounded quarterly. Set up an equation that models the problem and ﬁnd the amount of money in the account after 15 years. Round your ﬁnal answer to the nearest cent. (5 points) 41: Mt) : lojoooﬂ + ALIS) : 10.00% I + eff”) .2: Em 7/. (I 6. The half-life of radioactive radium is 1620 years. If the present amount is 40 g, how much will remain after 100 years? Round your ﬁnal answer to 4 ﬂacimal places. (6 POiIItS) I (020 K in ( Haw ' h2leO—b aothCLC )”*>‘li1:€’ “bk: 1010 veg/xiii) Me): 406 “51° 1.99%.? A000) : 4—06 a: 38. 3mg Bonus: Solve the following system of equations using either MATRIX METHOD, Gaussian elimination with back substitution or Gauss-Jordan elimination. List the row operations used at each step (For example: -3R1 + R2) You may use ROWOPS or MATRXOPS. (Up to 5 points) x—2y+3z=9 I “2‘ 3 q —x+3y=—4 '] 3 O h—Li 2x—5y+52:17 L ‘5 5 '7 Manic. 1 "I. 3 0t 425% l 0 o I “ZRI‘VES O I :lai —3g3+£; O l O ~l O “l O O 1 L 121+R1 l O 0] lei o l 3 ‘5 RL'HZE o O a 1+ ,LK I 0 Cl N 2- 5 O l 3 5 o o 1 94 ...
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Quiz 5 - Fall 2006 - College Algebra Quiz#5 Name Fall 2006...

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