4.5x103
4.5 times 103.
4500
4.5 x 103
4.5 X 103 The zeroes are superfluous.
4,500 can be written as 4.50 × 103 in scientific notation.
It is 8.9*10^-5 in scientific notation
No
It is "(scientific notation)".
It is: 2.7*10^0 in scientific notation
This number in scientific notation is 9.8x10-5.
The scientific notation for 89,450 is: 8.945 × 104