You cannot wright it.
However, you can write it as 4.9*10-5
It is already in standard form.
16 + 49 = 65
.49
It is already in its simplest form as 49/72
It is 49.
4.9 × 101
forty nine
49/2
It is 49, which is an integer and so has no simpler form.
72 = 7*7 = 49
1.00 and 49.00
0.49 or 49/100