growth/decay
 Tell whether the following represent exponential growth or decay.  Type the word growth or decay.  Spelling counts!. Numbers larger than 1=growth, less than 1=decayy = 30(0.6x)y = (⅞)xy = 2(5)x A new car that sells for \$31,000 and is losing it's value at a rate of 23% each year.   Write a function that models the value of the car.  Simplify the number in parenthesis.  Do NOT use any commas, \$, or extra zeros in your answer.y=()x f(x) = (712 + 0.24)x f(x) =712(1.24)xAn initial population of 712 quail increases at an annual rate of 24%.  Write an exponential function to model the quail population.  f(x) =  712(0.24)x f(x) = 712(0.76)x Time is in hours, how many lives in 15 hoursy =P(.5)tThe half-life of an element is 6 hours.If you have 56mg of the element, how muchwill you have after 15 hours? 12mg 20mg 5.6mg 9.9mg y=8xy =1.2(3)xIn the following exponential functions,what are the values of "a" and "b"?b:a:b:a:  Mrs. Cooke is buying a painting for \$1,500.  (Shefound a money tree in her closet!) It appreciates(grows) in value 22% every year.  Write a function that models the value of the painting.  Simplify thenumber in parenthesis.Do NOT use any commas, \$, or extra zeros in your answer.y=()x y =P(.5)tThe half-life of a Iodine-32 is 2 days.If you have 100-mg of Iodine-32, how muchwill you have after 12 days?.5 mg .003 mg .02 mg 1.56 mg A new car that sells for \$31,000 and is losing it's value at a rate of 23% each year.   What is the valueof the car in 5 years?\$8391.03\$87,274.48\$27,595.26\$19.95 In the year 2000, the population in Canada was about 85 million and growing at a rate of1.32% each year.  At this growth rate, the function f(x) = 85(1.0132)x gives the population,in millions, x years after 2000.  Using this model,in what year will the population reach 100 million?2011201220132014  The equation f(x) = 3,150(.95)x represents the declining populations of cardinals in one Michigancounty.  How many cardinals will there be in 7 years?20,948 cardinals2200 cardinals2.1 x 1024 cardinals2395 cardinals 14 rabbits12 rabbits16 rabbits18 rabbitsThe rabbit population that is in the back of Mrs.Maynard's house is growing at a rate of 18% per year.  If there are 8 rabbits trying to get intoher garden in 2012, how many rabbits will betrying to get in in 2016?(round to the nearest whole rabbit)
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