In a year, almost a billion people on the planet didn't have access to clean drinking water. if there were 4.7*10^9 people in the world, then approximately what percent of them lived without clean drinking water

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.

To prove that def ~ gfh by the sss similarity theorem using the information provided in the diagram, it would be enough additional information to know that

Find the cosine function that is represented in the graph.