Beta is a measure of an investment's relative volatility. The higher the beta, the more sharply the value of the investment can be expected to fluctuate in relation to a market index. For example, Standard & Poor's 500 Index (S&P 500) has a beta coefficient (or base) of 1.
In the USA, NFPA 1 requires portable fire extinguishers to be mounted with their top no more than 5 feet from the floor, if under 40 pounds, no more than 3 1/2 feet (42 inches) if they are over 40 pounds. In both cases, the bottom of the fire extinguisher must be at least 4 inches from the floor, except for larger extinguishers mounted on wheels. NFPA 1: 13.6.8.1.3.8 (2009), with reference to NFPA 10: 6.1.3.8.
Will you be able to see the back burners when there is a range hood at 60 above the floor and sticking out from the wall about 12 to 14 inches? Some tall people may want to raise the hood higher to accommodate their height. The same book says that the average person can comfortably reach 75 inches high. From my experience the top of the standard wall cabinet is usually 84 inches (7 feet).