Answer:
The number 450,900,800 can be written in scientific notation as:
a. 4.509008 x 10⁸
b. 4.5 x 10⁸
c. 4.509 x 10⁸
d. 4.50900 x 10⁸
All of the above options are valid representations of 450,900,800 in scientific notation. The choice between them depends on the desired level of precision or significant figures.