Find a formula for the nth partial sum of the series and use it to find the series' sum if the series converges.5 + 
+ 
+ ... + 
+ ...
A. 
; 
B. 
; 
C. 
; 
D. 
; 
Answer: D
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Solve.An object is 30 feet from a lens with a focal length of 5 feet. What will be the image's distance from the lens? Round the answer to the nearest tenth if necessary. Use the following formula which describes how the image of an object is affected by a lens where o represents the object's distance from the lens, i represents the image's distance from the lens, and f represents the focal length of the lens. 
+ 
= 
A. 35 ft B. 6 ft C. 4.3 ft D. 25 ft
Solve the problem.A town has a population of 30,000 people and is increasing by 10% every year. What will the population be at the end of 4 years?
A. 42,000 people B. 39,930 people C. 13,923 people D. 43,923 people
Multiply the expressions.(7x - 5y)2
A. 49x2 - 70xy + 25y2 B. 49x2 + 25y2 C. 7x2 + 25y2 D. 7x2 - 70xy + 25y2
Find the sum. Simplify when necessary.-14 + (-13) + (-17) + 11
A. 29 B. 5 C. 33 D. -33