Question

A culture starts with 4000 bacteria after 5 hours it has 4800 how many bacteria after 15 hours

Answer 1

Answer:28000

Step-by-step explanation:it gains 8000 bacteria every 5 hours and there are 3 fives in fifteen times 8000*3=24000 then add 4000

Answer 2

6400

Explanation:

so every 5 hours it gains 800 bacteria so 4800+800=5600 (hour 10)

and 5600+800=6400 (hour 15)