HEL please... A person pushes a box across a horizontal floor with an initial velocity of 5.2 m/s. The box has a mass of 22 kg, and the coefficient of kinetic friction between the box and the floor is 0.44. How far does the box slide before coming to rest?

Ahole in the ground in the shape of an inverted cone is 14 meters deep and has radius at the top of 11 meters. the cone is filled to the top with sawdust. the density of the sawdust depends upon the depth, x, following the formula ρ ( x ) = 2.5 + 1.2 e − 0.7 x kg/m3. find the total mass of sawdust in the conical hole.