A man finds that he has a mass of 100.6 kg. He goes on a diet, and several months later he finds that he has a mass of 96.4 kg. Express the mass 100.6 kg in scientific notation.

1006*10^-1kg

Explanation:

Because 1006kgx10^-1 will give you 100.6kg

The question is weird. It doesn't matter whether it was a man or a woman, or whether he went on a diet, or whether he gained or lost mass or stayed the same, or what his mass was later. In fact, it doesn't even matter WHAT the number 100.6 represents. The answer would be the same in any case.

100.6 = 1.006 x 10^2