Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

enanoverde

My code in Radiation expose 1 is: while final > init: print final result=f(final) print result print '------------------' resultfinal = resultfinal + result*ancho #resultadofinal=0.0 print resultadofinal final=final - 1 return resultfinal But not the same answer in the test: For (0,5,1) ---> Me =34.2839397259 instead of 39.10318784326239 Why ?? please help :P

  • one year ago
  • one year ago

  • This Question is Open
  1. enanoverde
    Best Response
    You've already chosen the best response.
    Medals 0

    sorry : The full code def f(x): import math return 10*math.e**(math.log(0.5)/5.27 * x) def area(inicio, final, ancho): print "de " +str(inicio ) +" a " +str(final) resultadofinal=0.0 while final > inicio: resultado=f(final) resultadofinal = resultadofinal + resultado*ancho final=final - 1 return resultadofinal print area(0, 5,1)

    • one year ago
  2. Lyrae
    Best Response
    You've already chosen the best response.
    Medals 0

    I think it should be something like this: def f(x): import math return 10*math.exp((math.log(0.5)/5.27) * x) def area(inicio, final, ancho): print "de " +str(inicio ) +" a " + str(final) resultadofinal = 0 while inicio < final: resultadofinal += f(inicio)*ancho inicio += ancho return resultadofinal print area(0, 5, 1)

    • one year ago
  3. Lyrae
    Best Response
    You've already chosen the best response.
    Medals 0

    btw, what course are you taking?

    • one year ago
  4. jarius327
    Best Response
    You've already chosen the best response.
    Medals 0

    I had the same issue at first. I did mine slightly different. In the body of the main function I defined the variable exposure to call the function f(start) and multiplied it by step. This returned the amount of radiation exposed times the length of time exposed and saved it to the variable. I then set up a while loop that ran while start is greater than stop minus step. Subtracting one keeps it from adding in the area after the stop point as well so that your answer isn't too large. For each loop the step was added to start (start += step) and then exposure was changed (exposure += f(start) * step) this calculates the next rectangle in the series. When start equals stop it returns the value of exposure. I think the problem with yours getting the wrong answer is similar to how mine was getting one that was too large before I subtracted step from my while loop. but since you are starting at the top stop point and working backwards yours is coming out too small. I hope this helps.

    • one year ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.