Lab3 Ch4 (F11)

# Lab3 Ch4 (F11) - a) How many milligrams will be present...

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Name _______________________________ Lab #3 – Chapter 4 – Solving Exponential and Logarithmic Equations Read each problem carefully and show your work! Write neatly and in pencil. Part I : Solving Exponential Functions – Give exact answers 1) 2) 3) 4) Part II : Solving Logarithmic Functions – Give exact answers 5) log (x) + 5 = 3 6) 7)

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8) ln (x + 4) + 5 = 8 Part III : Applications 9) Ryan starts a savings account with an initial investment of \$5000 at 8% compounded continuously. a) How much money will Ryan have after 3 years? (round to the nearest cent) b) How long will it take for his investment to double? (round answer to 1 decimal) 10) The function can be used to find the number of milligrams D of a certain drug that is in a patient’s bloodstream h hours after the drug has been administered.

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Unformatted text preview: a) How many milligrams will be present after 2 hours? (round answer to 1 decimal) b) When the number of milligrams reaches 1, the drug needs to be administered again. When (after how many hours) will the drug need to be administered? (round answer to 2 decimals) 11) The population of Collin County, which follows the exponential growth model, increased from 264,000 in 1990 to 490,000 in 2000. a) Find the exponential growth rate, k. (do not round k---use ALL decimals on the calculator) b) Write the exponential growth function. ______________________t A(t) = _________________ e (continued on the next page) c) What will the population be in 2012? (round your answer to the nearest whole number) d) When (in which year ) will the population be 640,000?...
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## This note was uploaded on 01/06/2012 for the course MATH 1314 taught by Professor Lisajuliano during the Spring '12 term at Collins.

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Lab3 Ch4 (F11) - a) How many milligrams will be present...

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