Find m2 ABD.
A
D
40°
B
C

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).

On a piece of paper graph f(x)=5•(0.4)^x

Ineed if you could explain and give me the answer you! this needs done