need help

Discussion in 'Homework Help' started by nour1, Oct 14, 2010.

  1. nour1

    Thread Starter New Member

    Oct 14, 2010
    10
    0
    :confused:hi how are u all?please i need help i have hard question that i canُ t solve it please explain it to me and solve it or gave me an example which have the same way to solve it please thwe question is:

    How many bits are in 1TB? ((Hint: depending on the tool used to calculate this you may need to use a trick to get the exact result. Note that 2^20=1000000(base 10)+d, where d is the difference between 2^20 and 1000000(base10)and that 1T=(1000000(base 10)+d)^2. Expand the equation for 1T into a sum of products form insert the value of d find the three products and then find their sum.
    thank you so much.:)
     
  2. Georacer

    Moderator

    Nov 25, 2009
    5,142
    1,266
    In general 1T means 10^12, which is a 1 followed by 12 0.

    Specificly in informatics, where numbers are expressed in powers of 2 the prefixes are:
    1K=2^10=1.024
    1M=2^20=1.048.576
    1G=2^30=1.073.741.824
    1T=2^40=1.099.511.627.776

    http://en.wikipedia.org/wiki/Binary_prefix for more info.
     
  3. nour1

    Thread Starter New Member

    Oct 14, 2010
    10
    0
    so the answer of the question is??
     
  4. Georacer

    Moderator

    Nov 25, 2009
    5,142
    1,266
    So the answer is 1T*(Number of bits in a byte).
     
  5. nour1

    Thread Starter New Member

    Oct 14, 2010
    10
    0
    thank for your help. but antil now i donُ t know how to solve it really and tomorrow i should submit :(
     
  6. Georacer

    Moderator

    Nov 25, 2009
    5,142
    1,266
    What is it that you can't solve? The multiplication (2^40)*8?
     
  7. nour1

    Thread Starter New Member

    Oct 14, 2010
    10
    0
    the holl question
     
  8. Georacer

    Moderator

    Nov 25, 2009
    5,142
    1,266
    The question is "how many bits are there in 1TB", right?

    I can't believe I 'm saying this, but to find the aswer hit the following buttons on a scientific calculator (windows has one): 2 ^ 40 * 8

    If I were you I wouldn't bother with the hint equation the question proposes.
     
  9. nour1

    Thread Starter New Member

    Oct 14, 2010
    10
    0
    thanks alot
     
  10. nour1

    Thread Starter New Member

    Oct 14, 2010
    10
    0
    but what about this question i solve it but i am not sure about answer please check it for me
    A limited number system uses base 12. Suppose there are at most four integer digits. The weights of the digits are 123, 122, 121, and 1. Special names are given to the weights as follows: 12 = 1 dozen, 122 = 1 gross, and 123 = 1 great gross.
    (a) How many beverage cans are in 6 great gross + 8 gross + 7 dozen + 4?
    (b) Find the representation in base 12 for 756910 beverage cans.
    Note: available digits are: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B.
    Ans:
    (a) 6 Ũ 123 + 8 Ũ 122 + 7 Ũ 12 + 4 = 11608
    (b) 7569 ũ 12 = 630 ...... 9
    630 ũ 12 = 52 ...... 6
    52 ũ 12 = 4 ...... 4
    4 ũ 12 = 0 ...... 4
    756910 = 446912
    and what we mean by ũ and Ũ what is the diferent between them
    thank u
     
  11. Georacer

    Moderator

    Nov 25, 2009
    5,142
    1,266
    Please correct the colour of the unit names, which appear in white. You also havent given the weight of the beveragecan.

    In all, this seems to be badly coppied. It hardly makes any sense. If you have copied this from a webpage, you propably don't have the right font to display special characters.
     
  12. nour1

    Thread Starter New Member

    Oct 14, 2010
    10
    0
    A limited number system uses base 12. Suppose there are at most four integer digits.the weights of the digits are are 12^3,12^2,12 and 1 .special names are given to the weights as follows:12=1dozen,12^2=1gross and 12^3=1 great gross.

    a)how many beverage cans are in 6 great gross+8 gross+7 dozen+4?
    b) find the representation in base12 for 756910 beverage cans.

    Note:available digits are:0,1,2,3,4,5,6,7,8,9,A,B.

    Ans:
    a)6 Ũ123+8 Ũ122+7 Ũ12+4=11608
    b)7569 ũ12=630…..9
    630 ũ12=52……6
    52 ũ12=4……….4
    4 ũ 12=0…………4
    756910 = 446912​
     
  13. nour1

    Thread Starter New Member

    Oct 14, 2010
    10
    0
    what we mean by ũ and Ũ what is the diferent between them
    thank u
    did we mean by
    is ũ =×
    and Ũ= ÷
    or something else??
    thank u
     
    Last edited: Oct 15, 2010
  14. nour1

    Thread Starter New Member

    Oct 14, 2010
    10
    0
    please answer
     
Loading...