To convert a decimal number to standard form, we need to express it in the form of a x 10n, where a is a number between 1 and 10 and n is an integer. Starting with 0.00562, we need to move the decimal point to the right until we obtain a number between 1 and 10. This means moving the decimal point four places to the right: 0.00562 = 5.62 x 10-3 Therefore, the answer is option A: 5.62 x 10-3.