Answer:
Marisol must send less than one snack pack.
Explanation:
Let, the number of snack pack be 'x'.
As, the weight of 1 snack pack is 14 lb. Then, the weight of 'x' snack pack is
lbs.
Also, it is given that there is a board game of weight 4 lb.
Since, the total weight of the package must be less than 25.
Thus, we get,

i.e.

i.e.

i.e. x < 1.5
Thus, the number of snack packs must be less than 1 (Since the snack pack cannot be in decimals).
Hence, Marisol must send less than one snack pack.