How did advances in communication technology after the industrial revolution contribute to europe's ability to establish and dominate new colonial empires?

Ineed to do my math homework and i am dumb so i need a smart person to me do math so just say sum if u good at math and i will give u my phone number to me with math

Which of the following was probably the most difficult challenge facing construction of the railroad?

What is the most celebrated piece of japanese literature and who was its author? why is it important in the literary world? (around 1000 ad by a woman)