The graph of an exponential function is given. Select the function for the graph from the functions listed.
A. f(x) = 3x+ 1
B. f(x) = 3x + 1
C. f(x) = 3x - 1
D. f(x) = 3x
Answer: D
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Determine whether the equation is quadratic.x3 - 9x2 + x = 0
A. No B. Yes
Solve for the indicated variable.P = P0ekt/1000, for t
A. t = 
ln (P - P0)
B. t = 
ln 
C. t = 
ln 
D. t = 
Find the x- and y-intercepts of f.f(x) = (x + 2)(x - 5)(x + 5)
A. x-intercepts: -5, 5, 2; y-intercept: 50 B. x-intercepts: -5, 5, 2; y-intercept: -50 C. x-intercepts: -2, -5, 5; y-intercept: -50 D. x-intercepts: -2, -5, 5; y-intercept: 50
Solve.In 1970, the population of a particular city is 785,000. In 1980, the population of the city is 689,300. Assume the population is decreasing according to the exponential-decay model. When will the population of the city be 100,000?
A. 2139 B. 2134 C. 2124 D. 2129