Calculus Questions

1. [-316.66 Points] DETAILS SCALCETB 4.?.009.M|. A model used for the yield Y of an agricultural crop as a function of the nitrogen level N in the soil (measured in appropriate units] is RN 25 + N2 where kis a positive constant. What nitrogen level gives the best vield? NeeeHeIe'.e @@ Y: 2. [416.66 Points] DETAILS SCALCETB 4.1014. A box with a square base and open top must have a volume of 13,500 cm3. Find the dimensions of the box that minimize the amount of material used. sides of base cm height cm 3. [416.66 Points] DETAILS SCALCETB 4.?.015.M|. If 30,000 cm2 of material is available to make a box with a square base and an open top, nd the largest possible volume of the box. Neee Help? 4. [416.66 Points] DETAILS SCALCETB 4.1021. Find the point on the line 1/ = 4x + 3 that is closest to the origin. (A v) = [ ) Need Help? @