Calculate (To Three Significant Figures) the Numerical Part of the Conversion

Essay

Calculate (to three significant figures) the numerical part of the conversion factors needed to carry out the following unit conversions:
a. density in g/cm³ to kg/m³
b. speed in mi/h to ft/s
c. area in km² to mi²
d. area in km² to cm²
e. mass/area of aluminum foil in mg/cm² to g/m²
f. number of gas molecules per unit volume from /m³ to /ft³
g. number of bacteria per unit area on a microscope slide from /mm² to /in²