Find the volume of the pyramid.

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).

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319

Need so much on this one how many yards?