Estimate the sum 4.86+9.57​

In trapezoid efgh, m∠gfe=63∘. identify m∠ghe. !

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.

Find the solution on the interval [0, 2pi)