Use the Appropriate Formula to Find the Indicated Figurate Number $\mathrm { H } _ { 14 } = 336$

Multiple Choice

Use the appropriate formula to find the indicated figurate number.
-the 14th hexagonal number

A) $\mathrm { H } _ { 14 } = 336$
B) $\mathrm { H } _ { 14 } = 378$
C) $\mathrm { H } _ { 14 } = 406$
D) $\mathrm { H } _ { 14 } = 112$