Take as an example the number 143.75.

If we put it in scientific notation in base 10 (decimal), then its significand (mantissa) is: Answer

And its exponent is: Answer

If now we put it in scientific notation in base 2 (binary), then its significand is: Answer

And its exponent is: Answer

(All answers are numeric. Both of the last two answers should be in binary, and not include leading zeroes).