Question

A bacteria culture begins with 13 bacteria which triple in amount every hour. How many bacteria exist in the culture at the 11th hour?

Answer 1

See actually :

Think of this in this way.

Answer 2

Think of this as a GP.

Answer 3

Initial value a1 = 13; common ratio = number of time it changes = 3

Answer 4

im lost still

Answer 5

See: remember the nth term formula I told you in previous question ?

Answer 6

yes i remember so i need to pluck 13 in a1?

Answer 7

Yes, a1 = 13; r = 3

Answer 8

so do i divide the 11 with 3 or multiple

Answer 9

Actually its 3 power (11-1)