MaplePlace Garage is posting five job listings with the online service. The cost for their services are: a) How much is each posting? b) How much less does Maple Place pay per posting compared to the price for one posting? c) What is the cost of the five postings? d) What is the total savings for the five postings? e) Express the total savings as a percent of the total cost for the five postings. Round to whole percent, (like 50%) Number of Job Postings Price per Job Posting 1 $395.00 each 2 $385.00 each 3 $375.00 each 4 $350.00 each 5 - 20 $320.00 each 21 - 50 $265.00 each

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