An initial population of 250 sparrows has been decreasing at a yearly rate of 3%.

a. An initial population of 250 sparrows has been decreasing at a yearly rate of 3%. Presuming that the population continues to decrease at the same rate, what is an equation that could be used to determine the population 5 years after the initial count was made. 11.

b. Hudson High School bought a $12,000 sound system for its gymnasium. The value of this sound system depreciates at a rate of 25% annually. What is an equation that can be used to predict what this system will be worth after n years.