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  • java multiply objects, BigInts?

    Thers a class called BigInt and it has a size and digit. size is the number of digits in the integer that is entered and digit is an array that holds the integer.

    I have to write a method that multiplies them. I tried using two for loops to go through each index and multiply them. I think one of my problems is that im storing the product too soon or just wrong.

    any help or a push in the right direction would be appreciated.

    this is what i have so far

    view plaincopy to clipboardprint?

    // multiply two BigInts

    public BigInt times(BigInt other)

    {

    //Declare i and initialize carry

    int i,j, temp;

    int carry = 0;

    //create product object

    BigInt product = new BigInt();

    //set size of product

    product.size = this.size + other.size;

    //Loops to run through elements of array and multiply

    for(i = this.size; i >= 0; i--)

    {

    for(j = other.size; j >= 0; j--)

    {

    temp = this.digit[i] * other.digit[j];

    product.digit[i+j] = temp % 10;

    carry = temp / 10;

    System.out.println(i + " Temp is " + temp);

    System.out.println("sum.digit[" + i +"] is " + product.digit[i]);

    }

    }

    return product;

    }

    1 AnswerProgramming & Design10 years ago
  • seperation of variables?

    x dy/dx = y^2+1

    so i moved the x to the right side and moved the left side over and got

    1/(y^2+1) dy/dx = 1/x

    integrating both sides gave me tan(y) = ln(x) +c

    to solve for y would i just take the arctan? or how would i solve for y?

    2 AnswersMathematics1 decade ago
  • condom question..........?

    if i wear a condom when i masturbate and it rides up but doesnt come right off, does that mean when i have sex the condom will ride up too? or is it just cuz i have a tight grip when im doing it myself?

    8 AnswersMen's Health1 decade ago
  • in covalent bonds do more bonds make a more stable bond?

    like the lewis stucture for N2 has a triple bond so would that be stronger than N2H4's bond which only has a single bond between the N's?

    2 AnswersChemistry1 decade ago
  • implicit differentiation?

    ln(x^2 - 24 y) = x - y + 6 and y( -5 ) = 1, find y'( -5 )

    so after working it out i got y'=11/23 but that was wrong

    what did i do wrong? i differentiated it, plugged in 1 for y and solved for y'

    any help?

    1 AnswerMathematics1 decade ago
  • oxidation number help?

    so i have this reaction

    Pb(s) + PbO2(s) + H2SO4(aq) -> PbSO4

    so the first step in redox is to assign oxidation numbers

    i got 0 then +4 -2 then +1 +6 -2 -> i dont know how to assign oxidation numbers for Pb and S, i know O is -2 but based on the chart i have there is nothing for Pb or S

    can anyone help me figure this out so i can finish doing the redox steps.

    thanks

    1 AnswerChemistry1 decade ago
  • is it normal................?

    for a condom to sorta move around a little when put on? its not so loose that it comes off easily but its not skin tight either.

    3 AnswersMen's Health1 decade ago
  • calc max problems.......?

    the top and bottom margins of a poster are 2cm and the side margins are each 4cm. If the area of printed material on the poster is fixed at 382 square centimeters, find the dimensions of the poster with the smallest area.

    so the area l*w = 382

    and the perimiter = 2(l-4)+2(w-8)

    but if i try to solve for l i get a negative number. can someone help me out?

    2 AnswersMathematics1 decade ago
  • help balancing equation?

    how would you balance this equation, nitrogen dioxide with water forms nitric acid and nitrogen monoxide

    NO2 + H20 -> HNO3 + NO

    they all have O which makes it hard to balance,

    any help would be appreciated.

    2 AnswersChemistry1 decade ago
  • find the center of mass of a cone of height 8cm and base diameter 16cm?

    i have no clue how to go about solving this besides the formula for finding x,y, and z bar.

    any hints or help would be appreciated

    1 AnswerMathematics1 decade ago
  • solubility rules......?

    since both na and cl are soluble, when the come together are they solid or aqueous?

    3 AnswersChemistry1 decade ago
  • find the length of the curve?

    the function is f(x) = sqrt(16-x^2) , y greater than or equal to 0

    does that mean that i have to solve the equation for x and then use the integration formula for finding the length of a curve from y = 0 to y = infiniti

    any help would be appreciated.

    2 AnswersMathematics1 decade ago
  • integrate 3^(4x)dx ....confusion with answer?

    to solve this i know you have to change it to base e

    and therefore you make w=ln(3)4x

    then you solve for dw

    and after everything

    i got

    3^(4x)/(4ln(3)

    but when i checked that it said 81^x/(ln(81)

    i know that 3^4 is 81 but how did they get ln(81)?

    3 AnswersMathematics1 decade ago
  • Find the exact value of the area under the first arch of f(x) = xsinx?

    what is meant by "under the first arch"

    also, hints on solving it are appreciated, i know you have to use substitution by parts with u = x so that du = dx and go from there...

    3 AnswersMathematics1 decade ago
  • find the area between y = e^x, y = 2, and the y-axis.?

    i know this is solved by integration but since there is only 1 function, y = e^x, would you solve that for x and then the limits of integration would be 2 and 0.

    any hints or tips on how to solve this would be highly appreciated

    1 AnswerMathematics1 decade ago
  • 700 x 23c bike rim and tire?

    what does the 700 stand for and what does the 23c stand for?

    3 AnswersCycling1 decade ago
  • if you upgraded to win 7 but then restored your system back to vista?

    does that automatically deactivate the win 7 key or do you have to do something else?

    3 AnswersSoftware1 decade ago