Use the graph of 
to write an equation for the function whose graph is shown.
?
?
A. 
B. 
C. 
D. 
E. 
Answer: E
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Solve the problem.The annual population density of a species of insect after n years is modeled by a sequence. Suppose that the initial density of insects is 692 with r = 0.6. Write a recursive sequence that describes this data, where an denotes the insect density during year n.Find the terms a1 , a2 , a3 , ...., a5 . Round to two decimal places, if necessary.
A. a1 = 415.20, a2 = 249.12, a3 = 149.47, a4 = 89.68, a5 = 53.81 B. a1 = 692, a2 = 1107.20, a3 = 1771.52, a4 = 2834.43, a5 = 4535.09 C. a1 = 692, a2 = 692, a3 = 692, a4 = 692, a5 = 692 D. a1 = 692 , a2 = 415.20, a3 = 249.12, a4 = 149.47, a5 = 89.68
Determine whether the relation represents a function. If it is a function, state the domain and range.
A. function domain: {3, 4, 5, 6} range: {12, 16, 20, 24} B. function domain:{12, 16, 20, 24} range: {3, 4, 5, 6} C. not a function
Find the coordinates of the vertex and the direction of opening of each parabola.y = (x + 2)2 + 8
A. (8, -2) opens downward B. (8, -4) opens downward C. (-8, 2) opens upward D. (-2, 8) opens upward
Solve the equation. If the equation is an identity or a contradiction, state this.16x + 9(x + 1) = 25(x + 1) - 16
A. {1} B. ? or { }; contradiction C. {0} D. all real numbers; identity