Hey rectangular prims with a volume of five cubic units is filled with cubes with side links of 1/3 unit how many 1/3 unit cubes does it take to fill the prims

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

Acompany manufactures large valves, packed in boxes. a shipment consists of 1500 valves packed in 75 boxes. each box has the outer dimensions 1.2 x 0.8 x 1.6 m and the inner dimensions 1.19 x 0.79 x 1.59 m. the boxes are loaded on a vehicle (truck + trailer). the available capacity in the vehicle combination is 140 m3. each valve has a volume of 0.06 m3. - calculate the load factor on the box level (%). - calculate the load factor on the vehicle level (%). - calculate the overall load factor (%).

I'm confused on this could anyone me and show me what i need to do to solve it.