Dolbear's law states the relationship between the rate at which snowy tree crickets chirp and the air temperature of their environment. the formula is upper t equals 50 plus startfraction upper n minus 40 over 4 endfractiont=50+
n−40
4, where t is a temperature in degrees fahrenheit and n is a number of chirps per minute. if tequals=°f, find the number of chirps per minute.

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !

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