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Use the Appropriate Formula to Find the Indicated Figurate Number O15=225\mathrm { O } _ { 15 } = 225

Question 2

Multiple Choice

Use the appropriate formula to find the indicated figurate number.
-the 15th octagonal number


A) O15=225\mathrm { O } _ { 15 } = 225
B) O15=82.5\mathrm { O } _ { 15 } = 82.5
C) O15=645\mathrm { O } _ { 15 } = 645
D) O15=187.5\mathrm { O } _ { 15 } = 187.5

Correct Answer:

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