Final answer:
To express 0.5401 in scientific notation, move the decimal three places to the right, resulting in 5.401 × 10^-3.
Step-by-step explanation:
The number 0.5401 can be expressed in scientific notation by moving the decimal point to the right to create a number between 1 and 10, and then multiplying by 10 with the appropriate negative exponent. The decimal would need to move 3 places to the right (since we start after the leading zero), which gives us 5.401. Hence, we'll use a power of 10 with an exponent of -3 because we moved to the right. Therefore, 0.5401 expressed in scientific notation is 5.401 × 10-3.