Help, please what do I need to do ?

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg

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.

Which expression is the factorization of x^2+10+21