the population of snails in a tank at the aquarium is found to triple every year. mark visits the aquarium and counts 80 snails in the tank. write a function f(n) to model the number of snails in the tank n years after mark's visit

For this case we have an equation of the form:
 f (n) = A * (b) ^ n
 Where,
 A: initial amount
 b: growth rate
 n: number of years
 Substituting values we have:
 f (n) = 80 * (3) ^ n
 Answer:
 a function f (n) to model the number of snails in the tank n years after mark's visit is:
 f (n) = 80 * (3) ^ n