You collect sample data to calculate the relationship between age of the manufacturing equipment at your facility and the hours of downtime of that equipment. Using data ranging from 0.5 years old to 20 years old for the equipment, you obtain the regression equation for annual hours of downtime of y=10+0.5x with a high correlation coefficient. How many hours of downtime would you predict for equipment that is 8 years old? (Round to the nearest 10thof a year)