Question

If a city that currently has a population of 1000 triples in size every 8 years, what will the population be in 24 years? Is the population growth modeled by a linear function or an exponential function? A) 12,000; linear B) 18,000; exponential C) 20,000; linear D) 27,000; exponential

Answer 1

For this case we have a function of the form:
 y = A * (b) ^ t
 Where,
 A: initial amount
 b: growth rate
 t: time
 Substituting values we have:
 y = 1000 * (3) ^ ((1/8) * t)
 For 24 years we have:
 y = 1000 * (3) ^ ((1/8) * 24)
 y = 27000
 Answer:
 D) 27,000; exponential

Answer 2

Answer:

D ) 27,000; exponential

Step-by-step explanation:

y = A(b) ^ t

 A: initial amount

b: growth rate

t: time y = 1000 * (3) ^ ((1/8) * t)

For 24 years we have: y = 1000 * (3) ^ ((1/8) * 24) y = 27000