What is the sum of the geometric sequence 1, 3, 9, if there are 13 terms
a 123,201
b 164,268
c 797,161
d 818,573

c. 797161

Step-by-step explanation:

Here, the given geometric sequence,

1, 3, 9, ...    

And, total number of the terms , n = 13.

first term, a = 1, and the common ratio, = 3

Since, the sum of the geometric series,  

⇒

⇒  

⇒

⇒

Thus, the sum of the given geometric series is 797161.

Therefore, Option C is correct.

7. 153.86 ft

8. 12.56 ft

9. 78.5 m

10. 379.94 in

11. 132.665 m

12. 12.56 yd

13. 226.865 ft

14. 113.04 ft

15. 63.585 ft

16. 254.34 m

17. 50.24 cm

step-by-step explanation:

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