Which two decimals have the same value as 7/10

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.

Which best explains why this triangle is or is not a right triangle?

What is the absolute value of the complex number -4-sqrt2i