b over 2 minues 11 equals 9
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what does it means can you clear
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Units of time
Units of time measure how long something lasts. For example, how many seconds can you hold your breath, or how many minutes long is your favorite movie?
How long are different units?
A second is a short amount of time. It takes about 111 second to turn on a light or open the refrigerator door.
A minute is equal to 606060 seconds. It takes about 111 minute to brush your teeth.
An hour is equal to 606060 minutes. Extracurricular activities (gymnastics, piano lessons, soccer practice) often last about 111 hour.
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