Suppose you are getting new inground pool at your house. the pool is going to be a rectangle that is 30 feet by 15 feet. the outside border of the deck around the pool will also be a rectangle, which is 44 feet by 28 feet. the deck is going to be covered by a new tile that has a special, non-slip surface. each of the tiles is a square that is 6 inches on a side, and there is no gap between any of the tiles when they are laid. how much will be spent on purchasing just the right number of tiles if they cost $3.47 each?

Jeffery conducted a survey in his school and found that 30 of the 50 eighth grade students' favorite subject is mathematics. based on the results, jeffery concluded that out of the 200 students in his school, 120 students' favorite subject is mathematics. select the statement that is true about jeffery's conclusion. a. jeffery's conclusion is not valid because the sample was biased since only 200 students were surveyed. b. jeffery's conclusion is valid because the sample was random since all of the students were eighth grade students. c. jeffery's conclusion is valid because the sample was random. d. jeffery's conclusion is not valid because the sample was biased since all of the students were eighth grade students.

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).

If 25% of y is 30, what is 60% of y?