SOLUTION: sales of a portable MP3 player grew approximately exponentially from $0.06 billion in 1998 to $0.90 billion in 2002. predict sales of MP3 players in 2009.
this is where im stuck
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-> SOLUTION: sales of a portable MP3 player grew approximately exponentially from $0.06 billion in 1998 to $0.90 billion in 2002. predict sales of MP3 players in 2009.
this is where im stuck
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Question 848263: sales of a portable MP3 player grew approximately exponentially from $0.06 billion in 1998 to $0.90 billion in 2002. predict sales of MP3 players in 2009.
this is where im stuck b=(12)^1/4
my answer sheet says this part of the equation should =1.861
I may be entering something the wrong way into my calculator
Ps this this an intermediate algebra question not trig Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! sales of a portable MP3 player grew approximately exponentially from $0.06 billion in 1998 to $0.90 billion in 2002. predict sales of MP3 players in 2009.
this is where im stuck b=(12)^1/4
my answer sheet says this part of the equation should =1.861
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yes, 12^(1/4) is 1.861
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But:
y = ab^x
0.9 = 0.06b^x
b^x = 0.9/0.06 = 15
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So b^4 = 15
Not sure where you got 12.
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The b = 15^(1/4) = 1.968
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Cheers,
Stan H.
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