3. Is this an arithmetic or a geometric sequence? 5, 10, 15, 20, 25, ...

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).

An engineer scale model shows a building that is 3 inches tall. if the scale is 1 inch = 600 feet, how tall is the actual building?

Ahyperbola centered at the origin has a vertex at (-6,0) and a focus at (10,0). what are the directrices?