Pls help

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.

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days

How much would it be worth in 5, 10, 20 years