I'm not sure how to solve any of this

5. A farmer has 1500 yards of fencing with which to enclose two adjacent rectangular patches of land, one for corn and one for beans. A stream forms the boundary of one side so the farmer will not need to fence that side. What dimensions will yield the maximum total enclosed area? What is the maximum area? Show ALL work for full credit. 6. A baseball team plays in a stadium that holds 50,000 spectators. With ticket prices at $10, the average attendance had been 10,000. When ticket prices were lowered to $8, the average attendance rose to 20,000. (a) Find the demand function (price p as a function of attendance x), assuming it to be linear. (b) How should ticket prices be set to maximize revenue? (Round your answer to the nearest cent.) Remember: R(x)=px 7. Use Newton's Method to find the solution to the equation correct to 8 decimal places: x5 - 3x4+ x3 - x2 - x+6 =0 let x = -1