4. The use of wind power is growing rapidly. Global wind power generating
capacity for the years 1980 to 2000 is given approximately using the formula
below. Predict the global wind power generating capacity in the year 2010 if x is
the number of years after 1980. *
y= 30.5x² - 112x + 250.
In 1980, wind turbines in Europe generated about 5 gigawatt-hours of energy. Over the next 15 years, the amount of energy increased about 59% (each year). How many gigawatt-hours were generated
