The product 108 x 109 can be written as 10000 + ____ x 100 + 72.
19
18
17
15
108 x 109 = (100 + 8)(100 + 9)
=(100)2 + (100 x 9) + (100 x 8) + 72
=10000 + 100 x (9 + 8) + 72
= 10000 + 100 x 17 + 72
The exponential form of 1,540,000,000 can be written as 1.54x109.
The square of the number 106 can be written as 10000 + 36 + 100 x ____.