Use the figures to select the best definition of polyglob

Can someone me out here number 4 plz

Could somebody me with this radical simplification?

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.