Question

The mass of an object, 4.55 × 10⁻³ g, expressed in decimal notation is ______ g.

1) 0.000455
2) 0.0000455
3) 0.00000455
4) 0.000000455

Answer 1

The correct expression of 4.55 × 10⁻³ g in decimal notation is 0.00455 g, which corresponds to option 3.

Step-by-step explanation:

The mass of an object, 4.55 × 10⁻³ g, expressed in decimal notation is 0.00455 g. This conversion from scientific notation to decimal involves moving the decimal point three places to the left (because the exponent on the 10 is -3). Therefore, option 3) 0.00000455 is the correct answer. When converting from a larger unit to a smaller unit, such as grams to milligrams, one needs to multiply and move the decimal point to the right. However, in this case, since we are simply translating from scientific to decimal notation, we move the decimal to the left.