Plz help will mark brainliest

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).

Issof claims that the scale factor is 1/2. which statement about his claim is correct

Does the point (1, sqrt 7) lie on circle shown.