# chemistry

Which best describes a quantity or number that is considered to be "exact" by definition.

1) the human population
2) distance in light years to the nearest star
3) the winning time in the 100 m dash in the Olympic Games
4) the distance I rode my mountain bike this weekend
5) ounces of liquid beverage I consumed after my bike ride

1. 👍 0
2. 👎 0
3. 👁 89
1. Hard to count 5 .735 +/- .001 people

1. 👍 0
2. 👎 0

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