Find a formula for the nth partial sum of the series and use it to find the series' sum if the series converges.
+ 
+ 
+ ... + 
+ ...
A. 
; 8
B. 
; 8
C. 
; 4
D. 
; 4
Answer: C
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Factor the difference of two squares. Assume that variables represent whole numbers.a2b2 - 4c2
A. (b + 2c)(b - 2c) B. (a2b + 2c)(ab - 2c) C. (ab + 2c)(ab - 2c) D. (abc + 2)(ab - 2)
Solve the problem.A store takes inventory of a popular clock at the end of each business day. The table below shows the number of clocks in stock during a 5-day period in which no new clocks were received from the distributor. What are the domain and range of the function described by the table? 
A. Domain = [7, 23]; range = [1, 5] B. Domain = [1, 5]; range = [7, 23] C. Domain = {7, 11, 12, 16, 23}; range = {1, 2, 3, 4, 5} D. Domain = {1, 2, 3, 4, 5}; range = {7, 11, 12, 16, 23}
Solve the problem.In economics, functions that involve revenue, cost and profit are used. Suppose R(x) and C(x) denote the total revenue and the total cost, respectively, of producing a new high-tech widget. The difference 
represents the total profit for producing x widgets. Given R(x) = 60x - 0.4 x2 and 
find the equation for P(x).
A. P(x) = -0.4 x2 + 63x + 13 B. P(x) = 3x + 13 C. P(x) = -0.4 x2 + 57x - 13 D. P(x) = 60x - 0.4 x2
Simplify.
? 
A. 
B. 
C. 
D. 