Answer
a) $1.08\times10^{-6}km$
b) $0.00488 ps$
c) $739 Gm$
d) $115 pm$
Work Step by Step
a) To convert Mm to km, multiply by 1000 because 1 Mm= 1000 km. $ 1.08 Mm\times\frac{1 km}{1000000 Mm } = 1.08\times10^{-6}km$
b) To convert from fs to ps, divide by 1000 because 1 ps= 1000 fs. $ 4.88 fs\times\frac{1 ps }{1000 fs} = 0.00488 ps$
c) To convert from m to Gm, divide by 1,000,000,000 because 1 Gm= 1,000,000,000 m. $ 7.39\times10^{11} m\times\frac{1 Gm }{1000000000 Gm} = 739 Gm$
d) To convert from m to pm, multiply by 1,000,000,000,000 because 1 m= 1,000,000,000,000 pm. $ 1.15\times10^{-10} m\times\frac{1,000,000,000,000 pm }{1 m} = 115 pm$