$36 for 4 baseball hats; $56 for 7 baseball hats

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 volume of a cube is 8 in to the 3rd power. how long is each side?

Given that abcd is a rhombus, what is the value of x?