Question

There are 120 bacteria in a culture that doubles in size every day. How many bacteria were there 3 days ago?

Answer 1

Answer:

there were 20 bacterias three days ago

Answer 2

Answer:

Step-by-step explanation:

if they double everyday , then to find out how many were there 3 days ago

you will have to divide it by 2 three times .

We can check our answer by multiplying it from 2 .

Let's do it .

120/2=60/2=30/2=15

now check it

15*2=30*2=60*2=120

so ,15 is your answer .

Now, let me tell you one more type of this question

If they give you at the place of 120,1600 and say that they square themselves everyday

What was the no. the day before.

so, you will do it like this

√1600=80

now check it

80*80=1600

please mark as brainliest