Use the prefix multipliers to express each measurement without any exponents. (enter the number in the first blank and the units in the second (a) 78.9 x 10^-13 g. (b) 64.1 x 10^-10 l. (c) 31.5 x 10^11 m. (d) 80.7 x 10^-19

Use different conversion factor to accomplish the task given above,
a. (78.9x10^-13 g) x (1 x 10^12 picogram/ 1 gram) = 7.89 pg
b. (6.41x10^-10 L) x (1 x 10^9 nanoliter / 1 L) = 0.641 nL
c. (3.15x10^11 m) x ( 1 x 10^-12 terameter / 1 meter) = Tm
d. (80 x10^-19) x (1 x10^18 atto / 1) = 8 atto

Maybe the answer is 20mm. all i really did was just multiply, which is obvious.