Find the indicated term of the geometric sequence.a4 when a1 = -1 and r = 
.
A. 
B. - 
C. - 
D. - 
Answer: D
Mathematics
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Estimate the magnitude of the error involved in using the sum of the first four terms to approximate the sum of the entire series.
A. 
B. 8.50 × 10-6
C. 5.95 × 10-5
D. 4.16 × 10-4
Mathematics
Answer the question.Fred has taken four exams so far in his Chemistry course. His scores are 89, 71, 76, and 92. What is the average of these scores?
A. 82 B. 78 C. 164 D. 85
Mathematics
Solve the absolute value inequality. Other than ?, use interval notation to express the solution set and graph the solution set on a number line.|x + 8| ? 0
A. {-8}
B. (-?, -8)
C. {8}
D. ?
Mathematics
Find the standard form of the equation of the ellipse with vertices 
and eccentricity 
.
A. 
B. 
C. 
D. 
E. 
Mathematics