Give the value of the function in radians.cos-1 -0.4079
A. 1.991
B. 4.292
C. -0.420
D. 5.133
Answer: A
Mathematics
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Solve the problem.Find the sum of the infinite series 1 + 4r + r2 + 4r3 + r4 + 4r5 + r6 + ... for those values of r for which it converges.
A. 
B. 
C. 
D. 
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Solve.An automotive technician has recorded the number of hours of labor required for each of the last eight engine rebuilds. Find the range of these times.21.518.722.320.917.619.821.220.7
A. 5.2 hours B. 17.7 hours C. 17.6 hours D. 4.7 hours
Mathematics
Solve the inequality. Graph the solution set, and state the solution set in interval notation.|x| ? 3
A. (-?, -3] ? [3, ?)
B. (-3, 3)
C. [-3, 3]
D. (-?, 3]
Mathematics
Add or subtract. Simplify your answer to lowest terms.
+ 
- 
A. 
B. 
C. 
D. 
Mathematics