A device contains two circuits. The second circuit is a backup for the first, so the second is used only when the first has failed. The device fails when and only when the second circuit fails. Let X and Y be the times at which the first and second circuits fail, respectively. X and Y have joint probability density function f(x, y)= \begin{cases} 6 e^{-x} e^{-2y} & \text{for } 0 < x < y < \infty \\ 0 & \text{otherwise} \end{cases} What is the expected

Identify the converse of the following conditional: if a point is in the first quadrant, then its coordinates are positive. if the coordinates of a point are not positive, then the point is not in the first quadrant. if the coordinates of a point are positive, then the point is in the first quadrant. if a point is in the first quadrant, then its coordinates are positive. if a point is not in the first quadrant, then the coordinates of the point are not positive.

Math each whole number with a rational,exponential expression

Find the ratios of the corresponding sides