Kilometers (km).
The most appropriate metric unit to measure the mass of a concrete block is kilograms (kg).
millometers
The appropriate SI base unit to measure the time it takes to play a CD is the second (s).
Kilograms or pounds.
The most appropriate unit of measure for the length between the bases on a softball field is feet. Softball fields typically have bases that are 60 feet apart, making feet a practical and standard unit for this measurement. Using inches or yards could be less convenient for measuring such relatively short distances in the context of the game.
Kilometers
Kilometres are the appropriate unit.
Miles or kilometers.
The standard unit to measure mass is kilograms.
appropriate unit to measure the width of a textbook = ce ntimeters
The most appropriate unit of length for measure the distance between Las Vegas and Los Angeles would be either miles or kilometers.
The appropriate unit is a metre.
feet
Meters
A centimetre.
yards
Hs