11.2 miles −111.2 \text { miles }^{-1}11.2 miles −1
2500 mile s −12500 \text { mile s }^{-1}2500 mile s −1
11.2kms−111.2 \mathrm{kms}^{-1}11.2kms−1
2500 km2500 \mathrm{~km}2500 km
