173.99cm multiply 68.5 x 2.54 always use that number when converting inches to cm
10.3 is good the correct rounding of three sig figures
Answer:
Mercury is useful in lighting because it contributes to the bulbs' efficient operation and life expectancy. Fluorescent and other mercury-added bulbs are generally more energy efficient and last longer than incandescent and other equivalent forms of lighting.
Explanation:
