Fencing is to be added to an existing wall of length 10 feet. Find the maximum area of the endosed rectangle if the additional fence is as follows. (Draw the rectangle on your paper and be sure to label the variables used for the length and width of the rectangle.) Wall Additional fence is 20 feet long Maximum Area is square feet b. Additional fence is 30 feet long Maximum Area is square feet C. Additional fence is 40 feet long Maximum Area is square feet A student was asked to find the limit of an expression. The work is shown below. Determine whether the student did the problem correctly or not. If the solution is incorrect, redo the problem to show the right solution. If the solution is correct, explain why it is correct. 4 1 a. lim = lim O Correct Solution O Incorrect Solution 1' - 41 2x - 4 . lim lim = 4 140 12 - sinc 240 21 - COST O Correct Solution O Incorrect Solution