A 5 kg box is sliding across the floor at 5 m/s. It hits another box that is 10 kg and is sitting still. After the impact, the 5 kg box is moving at 2.5 m/s. How fast is the second box moving?

In a series circuit the __ is the same at every point

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).

Could we see a galaxy that is 20 billion light-years away?