Give the number of significant figures: 832.000 km

Plss anybody know how to do this? ? i need the answers from a through d

Edward tolman explained the results of his study by theorizing that the rats were learning about the maze during every trial but they a. were agitated because other groups were getting reinforcement b. could not remember how to demonstrate it without reinforcement c. were not motivated to demonstrate it without reinforcement d. seemed to be too lazy to actually work without reinforcement

In positive numbers less than 1, the zeros between the decimal point and non zero are significant