Simplify square root -144 imaginary complex number

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

Meghan has created a diagram of her city with her house, school, store, and gym identified. a. how far is it from the gym to the store? b. meghan also wants to walk to get some exercise, rather than going to the gym. she decides to walk along arc ab. how far will she walk? round to 3 decimal places.

What are the measures of angles a, b, and c? show your work and explain your answers. 25 points