A clock tower rings bell every hour. Every hour, it will ring once with probability 1/3 and twice with probability 2/3. The numbers of times the bell rings at different hours are independent.
If we stay on campus for 4 hours (we hear bell on 4 occasions) what is the probability that we hear in total 7 rings?

An airport in death valley is 60 feet below sea level, and an airplane is flying 2,000 feet above sea level. how many feet must the plane descend in order to land? a. 2060 b. 2000 feet c. 1940 feet d. 1880 feet e.1400 feet will mark as brainliest

Even if a person is in very good shape, applying to be a police officer requires commitment to fitness. applicants must pass a physical fitness test. in order to prepare for the test, janet purchases an activity tracker to court her steps. her goal is to walk 10,000 steps each day. she measures heard average step length to be 30 inches. play janet runs, her average steps length increases to 36 in. how many steps would she have to take to run 1 mile 50280 round to the nearest step

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14