Using the Rule of 70, estimate the time that it will take for a population to double if the growth rate is 1.3%. (*round to the nearest 10th of a year)

Using the Rule of 70, estimate the the growth rate if 40 years is the time that it will take for a population to double. (*round to the nearest 100th of a percent)

If the population on July 1, 2010 is 20,500 and on July 1, 2011 the population is 24,000, What is the Growth Rate for the year? (*round to the nearest 10th of a percent)

You invest $2000.00 that is compounded monthly (twelve times per year) for 15 years at an annual interest rate of 4%. Use the discrete exponential growth model to calculate the value of the investment at the end of the 15 years. (*Round to the nearest penny)HINT: Use the model P=I(1+r/n)^(nt)

In the World the current population is around 6.9 billion. Assuming the growth rate is continuous at an annual rate of 1.1%, use the continuous exponential growth model to estimate the world population in 20 years. (*Round your answer to the nearest tenth of a billion people) HINT: Use P=Ie^(rt) with e 2.71828

A hypothetical population of rats has an initial population of I = 500, the Carrying Capacity for their environment is K = 4,000 and the constant of proportionality for the rat population is k = 2/3. Use the logistic growth model to estimate the rat population after 4 years. HINT: Use the model P=K/(1+Ae^(-kt) ) ,A= (K-I)/Iwith e2.71828