Why were the captains of industry called robber barons?

Well you've practically answered the question yourself. The upper classes considered themselves to be captains of industry. They provided work for people. The problem was that they also took from the poor and gave to the rich to make them richer. You need only read about the history of the Railways to know what this last statement means.

Remember soh-cah-toasoh: cah: toa: now, looking at the picture we can see that we have an angle, the hypotenuse and want to find the value of the adjacent side to the angle. so we use cah to find the adjacent angle. plug in what we have: we need to solve for x now so we get it by itself on one side: plug this into your calculator and you'll find that:

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