Write log 81 + log 64 + log 5 - log 72. in the form of n

What is the area of triangle abc if a = 8, b = 11, and c = 15?

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz

Can someone me with this problem . show your work .