Answer: see below
Explanation:
Zeros between the digit and decimal point are NOT significant.
Zeros between digits ARE significant.
a. 230 mL. sf: 23
b. 0.00540 s sf: 540
c. 1440 sf: 144
d. 50 ℃ sf: 5
e. 0.9405 g/cm3 sf: 9405
f. 700 jellybeans sf: 7
g. 1.05 x 10⁶ sf: 105