The length of one side of a square pond is 15 feet the pond is surrounded by a 3 foot walkway what is the total area of the pond and walkway in square feet

Renee hiked for 6 3/4 miles. after resting, renee hiked back along the same route for 5 1/4 miles. how many more miles does renee need to hike to return to the place where she started? represent your answer as a simplified mixed number, if necessary.