Convert the following into basic units.
(i) 28.7 pm (ii) 15.15 µs (iii) 25365 mg
(i) 28.7 pm x ${{10}^{-12}}$ m / 1 pm = 2.87x ${{10}^{-11}}$ m
(ii)15.15 µ s x ${{10}^{-6}}$ s / 1 µ s = 1.515 x ${{10}^{-5}}$ s
(iii) 25365 mg x 1 g / 1000 mg x 1kg / 1000g = 2.5365 x ${{10}^{-2}}$ Kg