Find a formula for the nth partial sum of the series and use it to find the series' sum if the series converges.5 - 45 + 405 - 3645 + ... + (-1)n-1 5 ? 9n-1 + ...
A. 
; series diverges
B. 
; series diverges
C. 
; 
D. 
; 
Answer: B
Mathematics
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Change the Cartesian integral to an equivalent polar integral, and then evaluate.
A. 
B. 
C. 
D. 
Mathematics
Find the second derivative of the function.y = 
A. 
= 1 + 
B. 
= 2 - 
C. 
= 2 + 
D. 
= 2x - 
Mathematics
Provide an appropriate response.In oblique triangle ABC, find the indicated part. Round to the nearest tenth. Side b = 1, side c = 3, and angle A = 80°; find side a.
Fill in the blank(s) with the appropriate word(s).
Mathematics
Solve the problem.Eloise contracts to work for 10 days, receiving 
the first day, 
the second day, 
the third day, and so on, with each day's pay triple that of the previous day. How much will she earn on the last day of the contract?
A. $196.83 B. $15.36 C. $590.49 D. $1771.47
Mathematics