The diameter of a dime is 705 thousands of an inch

Can someone answer it, and plot it, for 20 points and brainliest answer? p.s. they're the same ! : )

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 roots of the polynomial function f(x) = x^3 + 2x^2 + x