Each front tire on a particular type of vehicle is supposed to be filled to a pressure of 26 psi. suppose the actual air pressure in each tire is a random variable—x for the right tire and y for the left tire, with joint pdf given below.
f(x, y) = k(x^2 + y^2) 21 ≤ x ≤ 30, 21 ≤ y ≤ 30 0 otherwise
(a) compute the covariance between x and y. (round your answer to four decimal places.) cov(x,