What is the wavelength of a wave whose velocity is 12m/s and has a frequency of .75 Hz?

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).

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o

Which are causes of mechanical weathering? (check all that apply) a. acid rain b. plant growth c. animal actions d. carbon dioxide e. pressure release i chose b & e and got the question wrong.