Laura deposit $3000 in an account that has an interest rate of 1.96% compound mouthly. How much interest does she earn at end of the second month?

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.

How to do this , and can some one explain

Given: m∠ adb = m∠cdb ad ≅ dc prove: m∠ bac = m∠bca lol