Solve the Problem $250.8 \mathrm { ft } ^ { 2 }$

Multiple Choice

Solve the problem.
-A rectangular piece of fabric is 18 ft by 11 ft. A triangular area with a height of 5.5 ft and a base of 9.6 ft is cut from the fabric. How much area is left over?

A) $250.8 \mathrm { ft } ^ { 2 }$
B) $145.2 \mathrm { ft } ^ { 2 }$
C) $290.4 \mathrm { ft } ^ { 2 }$
D) $171.6 \mathrm { ft } ^ { 2 }$