How many hours is 1,373 minutes?

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.

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Extra points! find the missing dimension! need asap