Find the area of a figure whose coordinates are a(-2,2), b(2,2), c(2,-2), d(-2,-2)

An assembly consists of two mechanical components. suppose that the probabilities that the first and second components meet specifications are 0.87 and 0.84. assume that the components are independent. determine the probability mass function of the number of components in the assembly that meet specifications. x

Julia is going for a walk through the neighborhood. what unit of measure is most appropriate to describe the distance she walks?

Could somebody me with this radical simplification?