1. [-116.66 Points] DETAILS SCALCETS 4.7.009.MI. A model used for the yield Yof an agricultural crop as a function of the nitrogen level N in the soil (measured in appropriate units} is kN Y: 2 25 + N where k is a positive constant. What nitrogen level gives the best yield? Need Help? 2. [-116.66 Points] DETAILS SCALCETB 4.7.01 4. A box with a square base and open top must have a volume of 4,000 cm3. Find the dimensions of the box that minimize the amount of material used. sides of base :I cm 3. [-116.66 Points] DETAILS SCALCETB 4.7.01 5.MI. 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. S .me Need Help? 4. [0!16.66 Points] DETAILS PREVIOUS ANSWERS SCALCETS 4.7.021. Find the point on the line y = 5x + 4 that is closest to the origin. (x. y) =( x) Need Help