A weightlifter lifts a barbell a vertical distance of 2.40 m. They then walk 4.20 m horizontally across the weight room. If the average force required to lift the barbell is 2.00 x 103 N, how much work is done by the person? Show all work

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).