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 3 years ago
A laptop computer purchased for $1400. After each year the resale value decreased by 35%. What will be the resale value after 4 years?
 3 years ago
A laptop computer purchased for $1400. After each year the resale value decreased by 35%. What will be the resale value after 4 years?

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Flapdragon
 3 years ago
Best ResponseYou've already chosen the best response.1Year 1 (35% of 1400= 490) 1400 490= 910 Year 2 (35% of 910 = 318.5) 910 318.5= 591.5 Year 3 (35% of 591.5= 207 * rounded to the nearest hundredth*) 591.5 207= 384.5 Year 4 (35% of 384.5 = 134.6 *rounded to the nearest hundredth* ) 384.5  134.6= 249.9.

prady.iitkgp
 3 years ago
Best ResponseYou've already chosen the best response.0@flapdragon why do such long calculation you will get same answer as mine unless you haven't made any mistake

Flapdragon
 3 years ago
Best ResponseYou've already chosen the best response.1Just in case the person who asked the question needs to know how I got the answer. :)

jenb
 3 years ago
Best ResponseYou've already chosen the best response.0in this case a=1,b=k,c=k+1 so for \[\Delta = k ^{2}4\left( k +1 \right) =k ^{2}4k 4\] now use quadratic formula on this to find k.\[\div 2k=\left( 4\pm \sqrt{164\times 4} \right)\div2=\left( 4\pm \sqrt{32} \right)\div2=\left( 4\pm4\sqrt{2} \right)\]\[\div2=2\pm2\]
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