What is the vertical height h of the tetrahedron

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.

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square

Paul’s car is 18 feet long. he is making a model of his car that is 1/6 the actual size. what is the length of the model?