The terms of the geometric sequence are 1,3,9, ...,
The first term is a = 1
The common ratio is r = 3.
The sum of the first 10 terms is
Answer: 29524
Answer:
40
Step-by-step explanation:
3+7=10
10x4=40
40/4-7=3
Answer:
Step-by-step explanation:

Check:

81 - 36 = 45
45 = 45
Therefore, our answer, 9 is correct.
Hope that helps!
Answer:
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Answer:
A = 64 pi
Step-by-step explanation:
The circumference can be found by
C = 2 * pi *r
16 pi = 2 * pi *r
Divide each side by 2 pi
16 pi/ 2 pi = 2 * pi *r/ 2 pi
8 =r
The radius is 8
To find the area
A = pi r^2
A - pi (8)^2
A = 64 pi