Find the sum Sn of the first n terms of the geometric sequence. 7, -14, 28, -56, 112, . . . ; n = 13
A. 19,115
B. 19,111
C. 19,117
D. 19,124
Answer: C
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Find the coordinates of the vertex of the quadratic function.f(x) = -4x2 - 8x - 9
A. (-2, -17) B. (1, -21) C. (2, -41) D. (-1, -5)
Find the indicated probability.The following contingency table shows age at retirement (broken down by career) for a group of retired people.Retirement Age
Suppose one of these people is selected at random from the 61-65 age group. Find the probability that the person selected was an attorney.
A. 0.428 B. 0.109 C. 0.254 D. 0.237
The graph of a logarithmic function is shown. Select the function which matches the graph.
A. y = log(x - 2) B. y = log x - 2 C. y = 2 - log x D. y = log(2 - x)
Solve the problem.A bank loaned out $63,000, part of it at the rate of 
per year and the rest at a rate of 
per year. If the interest received was $5120, how much was loaned at 
A. $37,000 B. $26,000 C. $27,000 D. $36,000