The bottom of a box has a surface area of 25.0 cm2. The mass of the box is 34.0 kilograms. Acceleration due to gravity at sea level is 9.80 m/s2. What pressure is exerted by the box where it rests? 1.36 N/cm2 13.3 N/cm2 0.139 N/cm2 7.21 N/cm2