Question

A colony of 300,000 bacteria doubles in size every 35 minutes what will the population be 70 minutes from now ?

Answer 1

1,200,000

Explanation:

300,000 x 4

It doubles every 35 minutes so you multiply by 4

Answer 2

X=600000

Explanation:

Let the unknown value for 70minutes be x

So let's solve the given question

300000 bacteria is double in every 35minutes

So to solve we will have

300000 bacteria=35minutes

X bacteria=70 minutes

So let's cross multiply

35x=300000×70

Let's make x the subject of formula by dividing both sides by 35

X=300000×70/35

X=300000×2

X=600000

Therefore the population in 70 minutes is 600000