42x+45=56z 43x+56=34z
1 answer:
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Given : The Cost of Laptop in 2007 is $1250
Given : The Cost of Laptop in 2009 is $1100
Decrease in Price of Laptop from 2007 to 2009 : (1250 - 1100) = $150
A) Percent Decrease in the Price of the Laptop from 2007 to 2009 is :
Given : Decrease in Price of Laptop from 2009 to 2010 = $165
B) Percent Decrease in the Price of the Laptop from 2009 to 2010 is :
Use log rule
log(ab) = log a + log b
Take log of both sides:
Use log rule
log(a^n) = n*log(a)
log(ab) = log a + log b
Take log of both sides:
Use log rule
log(a^n) = n*log(a)