Use the Appropriate Formula to Find the Indicated Figurate Number $\mathrm { Hp } _{8} { = } = 172$

Multiple Choice

Use the appropriate formula to find the indicated figurate number.
-the 8th heptagonal number

A) $\mathrm { Hp } _{8} { = } = 172$
B) $\mathrm { Hp } _ { 8 } = 8.8$
C) $\operatorname { Hp8 } = 148$
D) $\mathrm { Hp } = 160$