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Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?

The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of 120 and a variance of 16. find the lower bound of the probability that there will be between 100 and 140 passengers (round off to second decimal place).