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1022 quiz 5 B Term 2008 answers

1022 quiz 5 B Term 2008 answers - Name w MA 1021 2008 B...

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Unformatted text preview: Name: w MA 1021 - 2008 B Term Section A02 December 15, 2008 Quiz — Sections 7.4 and 8.1 1. Find Isinsxcos3xdx (Iflpoints) E 1} {angx (I... SI—n1X) (of. )< JX 2.Ifind jx3tan3‘(5x3)sec2(5x3)ak U: 4?“ (SK-3) du: XZSQC1(SK3)§I’X (10poims) 3U: leLse¢l($K§ AX 3. Find J-xcosz xdx (10p0ints) ch szCOSXAX Au: Ax 0W: [L (I +Cos 2x)? dx 4. Find the solution to the following differential equation: d jaw y(Jm4)=8 Be sure to express your answer in the format y = f(x) - 2x AX __—- (3)8:— (10 points) 5. Radioactive kryptonite has a half—life of 231 years. A sample of strangely luminous green rock, believed to be left over from the explosion of the planet Krypton, is found to contain 10% as much kryptonite as would be found in a new sample. When did Krypton explode? You may leave your answer in terms of logarithmic or exponential functions. (8 points) k‘i‘ P(£)': l’(0)€ 231K M23!) ”a 35%): W0) ‘3 6. The rate of change in the size of the WP1 student population is proportional to the number of students currently enrolled. There are now 3000 students, and that number is currently growing at a rate of 300 students per year. Give an expression for the number of years until there are 5000 WPI students. You do not have to evaluate your answer. (8 points) k: 3‘” : 0,! 3000 kl PKt): P(o)e : 30006; ******* END OF QUIZ “HM“ ...
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