Order the tiles from the greatest to least magnitude.

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).

Me. i can't figure out this question. give an explanation too. .

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?