Suppose X and Y are random variables with joint density function. So.1e-(0.5x + 0.2y) if x > 0, y = 0 f(x, y) = 10 otherwise (a) Is f a joint density function? Yes Or No (b) Find P(Y > 4). (Round your answer to four decimal places.) Find P(X = 5, Y = 7). (Round your answer to four decimal places.) (c) Find the expected value of X. Find the expected value of Y.

John can eat 10 cookies in 1/2 hr how many cookies can he eat in 45 minutes make a proportion and solve

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)

The number of chocolate chips in a bag of chocolate chip cookies is approximately normally distributed with a mean of 12611261 chips and a standard deviation of 118118 chips. (a) determine the 2626th percentile for the number of chocolate chips in a bag. (b) determine the number of chocolate chips in a bag that make up the middle 9696% of bags. (c) what is the interquartile range of the number of chocolate chips in a bag of chocolate chip cookies?