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maxonik [38]
3 years ago
6

Find the sum of the geometric sequence 3 + 9 + 27 + 81.

Mathematics
1 answer:
Diano4ka-milaya [45]3 years ago
4 0

Answer:

120

Step-by-step explanation:

3+9= 12

12+27= 39

39+81= 120

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Step-by-step explanation: APEX,

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3 years ago
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Step-by-step explanation:

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4 0
3 years ago
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a circle has a circumstance of 20. it has an arc on length 4. what is the central angle of the arc in degrees?
erastovalidia [21]

Answer:

∠72°.

Step-by-step explanation:

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Cross multiply:

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4 0
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Step-by-step explanation:

4 0
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