Answer: There are 30 batches of barbeque sauce that she can make by using the spice mixture.
Explanation:
Since we have given that
Number of tablespoons of her spice mixture =

Number of tablespoons to make a batch of barbeque sauce =

so, the number of batches of barbeque sauce would be

Hence, there are 30 batches of barbeque sauce that she can make by using the spice mixture.