Suppose that the relation H

is defined as follows.
=
H
,
,
−
7
−
4
,
,
6
0
,
1
−
4
Give the domain and range of H
Write your answers using set notation.

Name the most appropriate metric unit for each measurement

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.