Find the variance and standard deviation of the data. Round your answers to the nearest hundredth.
78, 83, 85, 89, 92, 95

Need ! give step by step solutions on how to solve number one \frac{9-2\sqrt{3} }{12+\sqrt{3} } number two x+4=\sqrt{13x-20} number three (domain and range) f(x)=2\sqrt[3]{x} +1

What are the relative frequencies to the nearest hundredth of the columns of the two-way table? a b group 1 102 34 group 2 18 14

Which of the following expressions is equal to 2x^2+8