can anyone help and explain why this is either proportional or not? urgent!! (it needs an explanation too)

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

Solve the equation w^3 = 1,000 i honestly dont know how to punch this into a calculator pls

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?