Which shows the image of rectangle ABCD after rotation (x, y) (-y, x)

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).

Stephen thublin invests $1,000,000 in a 45-day certificate of deposit with 6.55% interest. what is the total interest income from the investment?

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'