# Thread: need help with binary and vectors

1. ## need help with binary and vectors

When the binary number 100011110011011001101001100111
is converted to an eight-digit hexadecimal number, what is the position of the digit D? Count the positions starting from 1 on the left.

i got the answer 23CD9A67, anyone know if thats right?

aaaaaaand
i have an idea on how to do the second question but im not entirely sure if im doing it right and i cant really risk making mistakes. Any help would be appreciated, thanks in advance.

2. ## Re: need help with binary and vectors

Originally Posted by mybeans
When the binary number 100011110011011001101001100111
is converted to an eight-digit hexadecimal number, what is the position of the digit D? Count the positions starting from 1 on the left.

i got the answer 23CD9A67, anyone know if thats right?

aaaaaaand
i have an idea on how to do the second question but im not entirely sure if im doing it right and i cant really risk making mistakes. Any help would be appreciated, thanks in advance.
Group it into 4 digit chunks

(00)10 0011 1100 1101 1001 1010 0110 0111
2 3 C D 9 A 6 7

so yes, you did it right.

for the matrix problem read here Mathwords: Inverse of a Matrix

3. ## Re: need help with binary and vectors

Originally Posted by mybeans
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i have an idea on how to do the second question but im not entirely sure if im doing it right and i cant really risk making mistakes. Any help would be appreciated, thanks in advance.
Then post what you have done here and we can check it for you.