HELP urgent plsss ;(((

Which triangles area would be calculated using the trigonometric area formula

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?

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.