Solve the problem.Consider a population that grows according to a linear growth model. The population in the fifth generation is P5 = 43 and the population in the ninth generation is P9 = 71. The common difference is d =
A. 4.
B. 14.
C. 7.
D. 28.
E. none of these
Answer: C
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Use similar triangles to solve the application.A surveyor needs to determine the length L of a river, but he does not want to get wet. He lays out the similar triangles in the diagram. What is the length of the river?
A. 225 m B. 25 m C. 375 m D. 5625 m
Solve the system of equations by substitution, if a solution exists.
A. x = -3, y = 10 B. No solution C. x = -2, y = 9 D. x = -2, y = 10
Find f-1(x) for the following one-to-one function f.f = {(-3, -3), (-2, -2), (-1, -1), (0, 0)}
A. f-1 = {(-3, -3), (-2, -2), (-1, -1), (0, 0)} B. f-1 = {(-3, 3), (-2, 2), (-1, 1), (0, 0)} C. f-1 = {(3, 3), (2, 2), (1, 1), (0, 0)} D. f-1 = {(3, -3), (2, -2), (1, -1), (0, 0)}
Find an equation of the line that has the given slope and contains the given point.m = 2, (-8, 4)
A. y - 4 = mx + 8 B. y - 4 = x + 8 C. y = 2x + 20 D. y = 2x - 20