Final answer:
To express the number 0.000435 in scientific notation, we move the decimal point to the right until there is only one non-zero digit to the left of the decimal point, resulting in 4.35. We then express this as a positive power of 10, (option B) 4.35 x 10^-4.
Step-by-step explanation:
To express the number 0.000435 in scientific notation, we need to move the decimal point to the right until there is only one non-zero digit to the left of the decimal point. In this case, we move the decimal point four places to the right, resulting in 4.35.
Since we moved the decimal point to the right, we need to express this as a positive power of 10. The number 0.000435 can be written as 4.35 x 10-4.
Therefore, the correct scientific notation for 0.000435 is (option B). 4.35 x 10-4.