Julie ran the 50-meter dash in 20 seconds. What was her speed? plz answer ASAP dont give links to answer please

The air that we breath is made mostly of which gaseous molecule

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).

Find the mass by adding the numbers from the three sliders