A phone sells for $245. It is now on sale for 20% off the original price. How many dollars off is the phone? A$25
B$49
C$68
D$69

Will mark brainliest question in the pic.

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.

What is the least common factor of 6 and 8