The cost of a certain amount of computer storage in 1980 was approximately $400,000. From that time, the cost of the storage has been decreasing at a rate of approximately 31% every 2 years. Find an exponential model for the cost C (in dollars) of this amount of storage t years after 1980. C =     Using the model, find the cost (in dollars) of this amount of storage in 2018. (Round your answer to the nearest integer.) $

A bacterial population grows exponentially.Initially there are 100 cells of bacteria.After one hour there are 800 cells.What is the doubling time for the population? Explain.If the growth continues unchecked, what will be the bacterialpopulation after one day? Explain.

The fish population of Lake Oconee is decreasing at a rate of 3% per year. In 2014 there were about 1300 fish. Write an exponential decay function to model this situation. Then find the population in 2020. O A y = 1300(0.97)* The population in 2020 will be exactly 1,082.86 fish. y = The population in 2020 will be about 1,083 fish. 1300(0.97) y = 1300(0.03)t The population in 2020 will be about 234 fish. y = 1300(0.7) The population in 2020 will be about 153 fish.

A native wolf species has been reintroduced into a national forest. Originally 200 wolves were transplanted, and after 3 years the population had grown to 665 wolves. If the population grows exponentially according to the formula P₁ = Po(1 + r)t (a) Find the growth rate. Round your answer to the nearest tenth of a percent. r = (b) If this trend continues, how many wolves will there be in ten years? wolves (c) If this trend continues, how long will it take for the population to grow to 1000 wolves? Round your answer to the nearest tenth of a year. years