In order to express the number 484 in standard form, consider that such a form is given by m x 10ⁿ, where m is a number between 1 and 10 and n is an integer number.
Consider that 484 can be written as 4.84 x 100 = 484, moreover, take into account 100 can be written as 10².
Then, you can write:
484 = 4.84 x 100 = 4.84 x 100²
Then, you have m = 4.84 and n = 2.
Hence, the given number in standard form is 4.84 x 10²