Can someone me with this question? this is my last question, but i am not sure what the answer is. serena has been hired to design a small cabin. he has drawn the blueprint below. her clients are still determining the overall size of the cabin, but serena has labeled the known lengths in feet. she wants to find an expression to represent the perimeter of the entire space. the perimeter of the cabin is the sum of all four sides and can be written as perimeter = 2a+2b. find an expression in terms of x that shows the total perimeter. (15 points)

Farmers know that driving heavy equipment on wet soil compresses the soil and injures future crops. here are data on the "penetrability" of the same type of soil at two levels of compression. penetrability is a measure of how much resistance plant roots will meet when they try to grow through the soil. compressed soil 2.85 2.66 3 2.82 2.76 2.81 2.78 3.08 2.94 2.86 3.08 2.82 2.78 2.98 3.00 2.78 2.96 2.90 3.18 3.16 intermediate soil 3.17 3.37 3.1 3.40 3.38 3.14 3.18 3.26 2.96 3.02 3.54 3.36 3.18 3.12 3.86 2.92 3.46 3.44 3.62 4.26 use the data, omitting the high outlier, to give a 95% confidence interval for the decrease in penetrability of compressed soil relative to intermediate soil. compute degrees of freedom using the conservative method. interval: to