Which of these is a mixture? a) air b) water c) hydrochloric acid d) carbon dioxide

15. one purpose of the tread pattern on a tire is to a reduce tire wear. b. reduce traction c. allow water to flow away from the tire. d. look impressive.

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?

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).