Mimi_x3
  • Mimi_x3
Only for Kaffeine, easy one first. The cost to run a vehicle is a + v^2/a dollars per hour where v is the average speed of the vehicle in km/h. Show thatt the cost for a trip of Dkm is lowest if the vehicle travels at v=a km/h
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
KatrinaKaif
  • KatrinaKaif
Do you want the work to? O_o
Mimi_x3
  • Mimi_x3
nope, wait its a show question. Just show the working if you're bothered.
KatrinaKaif
  • KatrinaKaif
Okay sorry, the stupid thing said server lost connection C = a + v2/a => dc/dv = 0 + 2v/a => dc/dv = 2v/a => 2v /a = 0 2v = 0(a) v = 0 => d2c / dv2 = d/v(2v/a)= 2/a (Postive value so cost is lowest for all values of v ) ??

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More answers

Mimi_x3
  • Mimi_x3
Sorry, its wrong.
KatrinaKaif
  • KatrinaKaif
K give me a moment.
Mimi_x3
  • Mimi_x3
You can ask for help if you want, i don't mind.
KatrinaKaif
  • KatrinaKaif
Omfg Mimi.
Mimi_x3
  • Mimi_x3
lols, what's wrong ? Archaic Mathematician can help :P
anonymous
  • anonymous
This is basic calc (calc 1), i wanna see her do this.
Mimi_x3
  • Mimi_x3
Isn't calc 1 ? college ? >_<
anonymous
  • anonymous
she can do it, i am sure. She solved harder ones before
Mimi_x3
  • Mimi_x3
ok, i'll give a little hint, it involved d s t
Mimi_x3
  • Mimi_x3
involves*
KatrinaKaif
  • KatrinaKaif
c(a) = 2v?? don't tell me I am wrong again. -_-
Mimi_x3
  • Mimi_x3
lols, yeah sorry. Want me to type up the solution ?
KatrinaKaif
  • KatrinaKaif
Lol Give me the answer and I ll figure the solution
anonymous
  • anonymous
no way
Mimi_x3
  • Mimi_x3
It's a show.
Mimi_x3
  • Mimi_x3
No way ?
KatrinaKaif
  • KatrinaKaif
Lagrange, stay out of it, and go away.
KatrinaKaif
  • KatrinaKaif
Mimi, type.
Mimi_x3
  • Mimi_x3
Archaic mathematician can help you.
KatrinaKaif
  • KatrinaKaif
I ll figure it out myself.
anonymous
  • anonymous
hard headed ^
Mimi_x3
  • Mimi_x3
lols, and stubborn -_-
KatrinaKaif
  • KatrinaKaif
Shut up featheres.
anonymous
  • anonymous
lets get some soap for that mouth
Mimi_x3
  • Mimi_x3
Please refrain from swearing, don't get angry man.
KatrinaKaif
  • KatrinaKaif
Lol You have no control over my fingers, so no use in stating stop :P Please feel free to hit the report abuse button =) It will be a donation
Mimi_x3
  • Mimi_x3
Hm...dw about the problem, I'll type up the solution if you want.
anonymous
  • anonymous
yeah, put her out her misery
Mimi_x3
  • Mimi_x3
lols, yeah i feel bad.
KatrinaKaif
  • KatrinaKaif
Didn't I say I ll figure it out on my own?
Mimi_x3
  • Mimi_x3
It'll take a while, it took me a while.
KatrinaKaif
  • KatrinaKaif
Doesn't matter. I have a brain gifted to me for it.
Mimi_x3
  • Mimi_x3
Okay, do it as you wish, don't need to give me the solution straight away.
anonymous
  • anonymous
yeah, let her use "her" brain to find the solution
KatrinaKaif
  • KatrinaKaif
Lagrange, how many effing times Have I told you to stay away from me? Gosh damn.
Mimi_x3
  • Mimi_x3
lols, dont be mean :P
Mimi_x3
  • Mimi_x3
Kaffeine is pissed off
anonymous
  • anonymous
woah, relax buddy
anonymous
  • anonymous
take a chill pill
KatrinaKaif
  • KatrinaKaif
Get a life dude, other than critizing me each time I solve a calc problem.
KatrinaKaif
  • KatrinaKaif
You crossed the limits a while ago, and I told you to STAY AWAY
anonymous
  • anonymous
nobody is criticizing you, i just find it weird that you can solve problems i give you, that are straight from calc 2, but you cant solve this one
Mimi_x3
  • Mimi_x3
You are making it sound so serious. Don't worry about it. I'll take up the solution.
KatrinaKaif
  • KatrinaKaif
Lol Does a person have be good at calc 1 to get into calc bc? Your derivative questions are easy as hell.
Mimi_x3
  • Mimi_x3
Time to travel D km T = D / S = D / V (hours) Cost to travel D km C = T * ( a + v^2/a ) = D / v ( a + v^2 / a ) = D ( a/v + v/a) dC / dt = D( -a/v^2 + 1/a) = 0 -a/v^2 + 1/a = 0 1/a = a/v^2 v^2 = a^2 -> a km/h check for minimum: (using second derivative) d^2C/dt^2 = D(2a/v^3 + 0) = D * 2a/a^3 = 2D/a^2 > 0 yes, the cost at v=a is the lowest. Therefore v=a km/h for lowest cost.
KatrinaKaif
  • KatrinaKaif
Damn. forgot to plug it into the equation
Mimi_x3
  • Mimi_x3
Yeah and you forgot about the distance.
KatrinaKaif
  • KatrinaKaif
Pellet >.>
KatrinaKaif
  • KatrinaKaif
I used the distance to get my 2 values in the first one..Forgot all about it
Mimi_x3
  • Mimi_x3
Yeah, when i did it I forgot about the other one as well xD
anonymous
  • anonymous
it was a nice try
Mimi_x3
  • Mimi_x3
Want an easier one kaffeine ?
Hero
  • Hero
This is all hilarious @Mimi_x3 @LagrangeSon678 @KatrinaKaif

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