Question

A type of bacterium triples in population every hour. Assuming you start with

90 bacteria, the formula that models the number of bacteria at the beginning
of hour nis:
a(n) = 90.3n-1
How many bacteria will there be at the beginning of hour 5?​

Answer 1

7290

Explanation:

Put 5 in the formula and evaluate.

a(5) = 90·3^(5-1) = 90·81 = 7290

There will be 7290 bacteria at the beginning of hour 5.