Evaluate 2(4h and minus5) and minus6 plus h for h and minus2.?

How has the technology behind fiber optics advanced since it's introduction to the telecommunications industry? Why is the inside of a black hole called a singularity? Which characteristics provides the best evidence that this pegmatite solidified deep underground? Which type of pressure area do winds blow out of? A deer can run how many kilometers a hour? What makes 2 propanol polar? Give a relationship between Celsius scale on Kelvin scale? Does water really exist under Europa's surface Jupiter's moon? Is lycopene more polar than beta-carotene? How do shorelines change? Is earthqueke powerful? How many watts will a 10 gauge extention cord handle? What does geotropism cause a plants roots to do? Is a special pleader valuable? Do most countries use metric system? Can a first level consumer eat a second level consumer? What is a mode indicator and where is it located? How much electricity costs when a light bulb is on for a long period of time? What is the primary danger in a thunder storm? If the natural predators are removed then the herbivore population will likely what?