which expression results in the least value?

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

41/17 as a decimal rounded to the nearest hundredth