Suppose that a retailer sells f(p, a) units of an item, where p is the price per unit of the item and a is the amount of money spent on advertising that item. Which of the following indicates that as the amount spent on advertising is decreased, demand for the item also decreases?
A. 
(50, 25) = -1
B. 
(50, 25) = 10
C. 
(50, -1) = -5
D. 
(50, 75) = -10
Answer: B
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Use I = Prt for simple interest to find the indicated quantity.P = $3000; t = 90 days; I = $105. Find r. (Use 360 days in a year.)
A. 3.5% B. 14.0% C. 9.7% D. 14.2%
Convert the units using unit fractions.22 c = 
pt
A. 88 B. 44 C. 176 D. 11
Find the center, vertices, and foci of the ellipse with the given equation.
+ 
= 1
A. Center: (0, 0); Vertices: (-10, 0), (10, 0); Foci: (-8, 0), (8, 0) B. Center: (0, 0); Vertices: (0, -10), (0, 10); Foci: (0, -6), (0, 6) C. Center: (0, 0); Vertices: (0, -10), (0, 10); Foci: (0, -8), (0, 8) D. Center: (0, 0); Vertices: (-10, 0), (10, 0); Foci: (-6, 0), (6, 0)
Identify the degree of the polynomial; then indicate whether the polynomial is a monomial, binomial, or trinomial or has no special polynomial name.
u3v - 9uv
A. degree = 6; binomial B. degree = 4; binomial C. degree = 3; trinomial D. degree = 3; binomial