anonymous
  • anonymous
Help with equation/scenario
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
@Nnesha hey can you confirm my answer form ? I got like 3.989 so I'm going with that. I did it by hand so I just want someone to check.
Nnesha
  • Nnesha
x is an exponent ?
Nnesha
  • Nnesha
can you please explain or show ur work plz how did you get that answer ? :=)

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Nnesha
  • Nnesha
what was ur first step ?
Nnesha
  • Nnesha
hey?? :(
anonymous
  • anonymous
hey sorry afk again. this is what I did (30000=1.18^x * 15 30000=1.18^x * 500) I used scalar multiplying
anonymous
  • anonymous
@Nnesha
anonymous
  • anonymous
my book has a whole section on that in this lesson so I thought that was what I do but idk
Nnesha
  • Nnesha
i don't know why or how you separated de 15 and 5000\[\huge\rm 30000=15500(1.18)^x\] you need to get rid of the 15500 so you can take ln both sides
Nnesha
  • Nnesha
divide both sides by 15500 and then take natural log
anonymous
  • anonymous
okay so 30000 / 15500 is 1.9354 and then just 1.18^x I think
anonymous
  • anonymous
Sorry if I'm not doing this right. Really trying though
Nnesha
  • Nnesha
yes right \[\huge\rm 1.935=(1.18)^x\] now take natural log both sides
anonymous
  • anonymous
isn't natural log just log10? I think someone told me that
Nnesha
  • Nnesha
ln is basically same as log same rules applies for both but ln has base e and and log_!0
Nnesha
  • Nnesha
log_10
anonymous
  • anonymous
I'm sorry can you show me how to set it up?
Nnesha
  • Nnesha
sure btw you can take ln or log you will get the same answer if you take `ln` \[\huge\rm \color{ReD}{ln} 1.935=\color{red}{ln}(1.18)^x\] or `log` \[\huge\rm \color{ReD}{log} 1.935=\color{red}{log }(1.18)^x\]
Nnesha
  • Nnesha
now apply the power rule \[\large\rm log_b x^y = y \log_b x\]
Nnesha
  • Nnesha
move the x exponent at front of log or ln

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