Dr. Grummann got his first job in 1990. In that year, the government took out 7.45% of each income for Social Security and Medicare until a person made $51,300. If Dr. Grummann earned $31,340 in 1990, how much did he pay in Social Security and Medicare?

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2

8litres of paint can cover 129.6 m². how much paint is required to paint an area of 243m²?

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