Final answer:
To convert the volume of a grain of salt from 0.03 mm³ to cm³, divide by 1,000. The resulting volume is 3 x 10⁻µ cm³, which corresponds to answer choice (d).
Step-by-step explanation:
The question is asking us to convert a volume from cubic millimeters to cubic centimeters. To perform this conversion, we need to know that 1 cubic centimeter (cm³) is equal to 1,000 cubic millimeters (mm³). Therefore, to convert from mm³ to cm³, we divide the volume in mm³ by 1,000.
In this case, the volume of a grain of salt is given as 0.03 mm³. To find out what this is in cm³, we divide 0.03 mm³ by 1,000:
Volume in cm³ = Volume in mm³ / 1,000
Volume in cm³ = 0.03 mm³ / 1,000
Volume in cm³ = 3 x 10⁻µ cm³
Thus, the correct answer is (d) 3 x 10⁻µ cm³.