Factor the binomial completely.z2 - 121
A. (z - 11)2
B. prime
C. (z + 11)(z - 11)
D. (z + 11)2
Answer: C
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Evaluate the integral.
A. 2
+ C
B. 2
+ 3 tan-1 
+ C
C. 2
+ 3 ln 
+ C
D. 2
- 3 ln 
+ C
Solve the problem.Two phone companies compete for customers in a city. Company 1 retains 3/4 of its customers and loses 1/4 of its customers to Company 2. Company 2 retains 5/6 of its customers and loses 1/6 to Company 1. If we represent the fraction of the market held last year by 
, where a is the number the that Company 1 had last year and b is the number that Company 2 had last year, then the number that each company will have this year can be found by the following matrix equation. 
= 
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If Company 1 has A = 81,000 customers and Company 2 has B = 153,000 customers this year, then how many customers did Company 2 have last year?
A. 162,000 customers
B. 72,000 customers
C. 168,000 customers
D. 76,000 customers
Determine algebraically whether the function is even, odd, or neither even nor odd.f(x) = -0.51x2 + ?x? + 4
A. Even B. Neither C. Odd
Solve the problem.Suppose that the sample space is S = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10} and that outcomes are equally likely. Compute the probability of the event E: "a number divisible by 3".
A. 
B. 
C. 3
D. 