Can somone explain how i got this wrong. i don't understand how the decimal has to be in the front of 3.

explanation:

if u put 3.74 that means there is three of something if u put .374 that means there is less than 1 of somethin if at makes sense.

1. Direct Combination or Synthesis ReactionIn a synthesis reaction two or more chemical species combine to form a more complex product.
2. Chemical Decomposition or Analysis ReactionIn a decomposition reaction a compound is broken into smaller chemical species.

3. Single Displacement or Substitution ReactionA substitution or single displacement reaction is characterized by one element being displaced from a compound by another element.