Which expression is equivalent to (5^-2)(5^-1)

Apath 3 m wide runs around the inside of a square park inside 60 m.find the area of the path.pls

Aman steps out of a plane at a height of 4,000m above the ground falls 2,000m very quickly and then opens his parachute and slowly falls the remaining 2000m to the ground what height above the ground would be the best choice for a reference point

The center of a circle represent by the equation (x+9)^2+(y-6)^2=10^2 (-9,6), (-6,9), (6,-9) ,(9,-6)