The answer is:4000
Since the meat already has 125 ounces of bacteria, in three hours that amount will double (125+125=250). After three more hours (total hours is now 6) the new amount of bacteria will double. (250+250=500) now we have 500. After three hours (total hours nine) (500+500=1000) and after 3 more hours (total hours is 12) it will double again (1000+1000=2000). And finally when the final 3 hours past we double one more time. (2000+2000=4000).
With that being said, there is an easier way of writing it. 125^5=4000.
Hope this helps and hope you have a great day and please make brainiest