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Unformatted text preview: , 36) Your signature: (7) Find a possible exponential function whose graph is given by: Your signature: (8) A photocopy machine can reduce copies to 90% of their original size. By copying an already reduced copy, further reductions can be made. (a) If is page is reduced twice to 81%, what percent enlargement is needed to return it to its original size? (b) How many times must a page be copied to make the nal copy less than 15% of the original? Your signature: (9) Let f ( t ) = Q o (1 + r ) t . Find Q o and r where f (8) = 56 . 74 and f (10) = 190 . 34 Your signature: (10) The halflife of uranium238 is about 4.47 billion years. (a) Write a formula for the quantity, Q , of uranium left after t billion years, if the initial quantity is Q o . (b) What percentage of the original amount of uranium is left around 1 . 4 billion years?...
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 Spring '09
 N/A
 Calculus

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