Question

A bacteria culture begins with 13 bacteria which triple in amount at the end of every hour. How many bacteria are grown during the 10th hour?

Answer 1

Answer:

255,879

Geometric Sequence Formula

$a_n = a1r^{(n-1)}\\\\a_1 :13\\\\r:3\\\\n:10$

Steps:

$a_1_0=13 (3)^{(10-1)}\\\\a_1_0=13(3)^{(9)}\\\\a_1_0=(13)19683\\\\a_1_0=255,879$