Question

Your baby brother has an ear infection. The doctor said there are probably 50,000 bacteria in his left ear. The penicillin the doctor prescribed will kill 7% of the bacteria every hour. About how long will it take for there to be less than 25,000 bacteria?​

Answer 1

Ok I'm not sure but (9 hours)

Explanation:

50,000 divided by 25,000 = 7

7 plus 2 equals 9.