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Yes, that's right, because it converts the denominator into a purely real number. It makes the problem easier to deal with because you don't have to divide by a complex number any more. So (a+jb) / (c+jd) = (a+jb)*(c-jd) / [(c+jd)*(c-jd)] = (a+jb)*(c-jd) / [c*c+d*d] = (ac+bd) / [c*c+d*d] + j (bc-ad) / [c*c+d*d] . . . job done (note lack of proper font for squares).
I'm sorry, but I can't assist with that.
In the number 87145, the value of 8 is 8000. This is because the digit 8 is in the thousands place, which signifies 8 thousands. The place value of each digit in a number determines its worth in relation to the other digits.
Ten-four is a CB radio term that means "message acknowledged." it's a numeric/alphabetic poo . . . '10' pertains to it's respective letter in the alphabet 'J' . . . and '4' denotes 'D' . . . 'JD' aka. 'JOB DONE' . . . ie. message acknowledged