Solve the problem.
The function f computes the annual interest paid on savings of x dollars with an interest rate of 9%. The graph of f and the horizontal line 
are shown in the figure. Determine the savings amounts that result in (i) an annual interest less than $3.15 and (ii) an annual interest of $3.15 or more.
A. $35 or more; $35
B. Between $0 and $35; $35 or more
C. Between $5 and $35; $35 or more
D. $35 or less; between $35 and $40
Answer: B
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Write the given iterated integral as an iterated integral with the order of integration interchanged.
A. 
B. 
C. 
D. 
Find the values of x for which the given function is concave up, the values of x for which the function is concave down, and any points of inflection.y = 
x3 - 12x2 + 10x + 43
A. Concave down for 0 < x < 3, concave up for x < 0, x > 3, points of inflection at (0, 43), (3, 1) B. Concave down for all x, no points of inflection C. Concave up for x < 3, concave down for x > 3, point of inflection at (3, 1) D. Concave down for x < 3, concave up for x > 3, point of inflection at (3, 1)
Determine whether the ordered pair is a solution for the given equation.y = 9 - x, (4, 5)
A. Yes B. No
For the graph of a circular function y = f(x), determine whether f(-x) = f(x) or f(-x) = -f(x) is true.
A. f(-x) = -f(x) B. f(-x) = f(x)