Question

A certain colony of bacteria triples in length every 10 minutes. Its length is now 1 millimeter. How long will it be in 40 minutes?

Answer 1

81 millimeters long in 40 minutes

Answer 2

Answer:

81 Millimetres

Step-by-step explanation:

This can be looked as a geometric progression having the common ratio as    r = 3 and the initial length is a = 1.

To find the length after 40 minutes we will be using the GP formula axr^(n-1)

Here the number of terms are 5 (which can be clocked at 0 mins, 10 mins, 20 mins, 30 mins, 40 mins)

1x3^(5-1)

1x3^4

= 81 mm