Solve the problem.In the formula N = Iekt, N is the number of items in terms of an initial population I at a given time t and k is a growth constant equal to the percent of growth per unit time. How long will it take for the population of a certain country to double if its annual growth rate is 7.8%? Round to the nearest year.
A. 1 yr
B. 4 yr
C. 26 yr
D. 9 yr
Answer: D
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Use properties of exponents to simplify the expression. First, express the answer in exponential form. Then, evaluate the expression.(13)4
A. 17; 1 B. 112; 12 C. 112; 1 D. 112; 0
Identify the points in the graph for the ordered pairs. 
(3, 5), (-3, 0)
A. I and G B. L and J C. D and J D. D and G
A function and its graph are given. Use the second derivative to determine intervals on which the function is concave up. Check these results against the graph shown.
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Solve the problem.The table shows the population of a certain city for selected years between 1950 and 2003. 
By using your calculator to find the logistic regression equation that best fits the data, determine the limiting size of the population.
A. 271,976 B. 254,180 C. 278, 715 D. 266,078