How do i find the surface area and the volume of this very complicated solids?

How many zeros does the function f(x)=4x3-x2+1 have

Four individuals pool money together to start a new business and agree to split the profits equally. n invests $6,000, x invests $2,000, y invests $8,000 and z invests $4,000. if the profits for the first month were $100,000, y receives than if the profits were divided in proportion to how much they invested.

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76