toxicsugar22
  • toxicsugar22
Caffenie leaces the body at a rate of 15.6% each hou. your first cup of coffee in the morning has 100 mg of caffenie How long will it take before you have 50 mg of that caffenie in your body and how long will it take before you have 25 mg of caffenine in your body
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
Y=-.156x + 100. Put in each value for x and solve.
anonymous
  • anonymous
I'm sorry, not for x, for y and solve for x.
anonymous
  • anonymous
Y=-.156x + 100. Put in each value for y and solve.

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More answers

toxicsugar22
  • toxicsugar22
k i got .00208 and .00312
toxicsugar22
  • toxicsugar22
ia itright
toxicsugar22
  • toxicsugar22
torch
anonymous
  • anonymous
Actually you have to use k=Ce^rt. C=.5 K=50 r=-.156 Solve for t.
toxicsugar22
  • toxicsugar22
ok so what doo i do first
toxicsugar22
  • toxicsugar22
after plugiign in the number s
toxicsugar22
  • toxicsugar22
can u show me please so i will know
toxicsugar22
  • toxicsugar22
can u show me please so i will know
anonymous
  • anonymous
K first divide by the constant. Then natural log both sides and divide by the other constant and you get the answer you had first.
toxicsugar22
  • toxicsugar22
.0028 and .0032
toxicsugar22
  • toxicsugar22
can u show me step by step so I know how to ddo it the next time
anonymous
  • anonymous
Alright do you have an answer key? Like what you're supposed to get?
toxicsugar22
  • toxicsugar22
no where
anonymous
  • anonymous
Well you said the natural log answer a while ago
anonymous
  • anonymous
Oh jk that was a different one.
toxicsugar22
  • toxicsugar22
yeah so can u please show me step by step on how to solve this problem
toxicsugar22
  • toxicsugar22
please
toxicsugar22
  • toxicsugar22
please
anonymous
  • anonymous
K hang on. I'll write it out for you but it'll take a bit. My iPad hates the typing in this.
toxicsugar22
  • toxicsugar22
not to be rude but cn u hurry up please
anonymous
  • anonymous
Alright, an easy way to think about it is to use a proportion. -.156=x/amount of caffeine. For example for the first one, you put in 100 and then you get 84.4. Basically you found the percentage of the amount of caffeine and subtracted it. You do that 4 times to get to 50, so that's 4 hours. Fir the second one, you do the same thing, and just keep going. You get 8 hours. Sorry it took so long, I was busy.
anonymous
  • anonymous
Good nuff?
toxicsugar22
  • toxicsugar22
yes thank you

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