Nancy's school is 4 miles west of her house and 9 miles south of her friend Carla's house.

Every day, Nancy

bicycles from her house to her school. After school, she bicycles from her

school to Carla's house.

Before dinner, she bicycles home on a bike path that goes straight

from Carla's house to her own house.

How far does Nancy bicycle each day? If necessary,

round to the nearest tenth.

miles