What is the depth of an ocean area if a sound pulse took 4 seconds to travel from the ship, to the bottom then back to the ship, and the speed of sound in this ocean area is 5,000 ft per second? Use the formula below:

Which of the following statements best describes what is occurring in the land surrounding the sahara desert? a desertification is increasing, and the desert is expanding. b. fewer people are trying to farm in this semiarid region. c. the desert is shrinking with the increased use of irrigation. d. increased urbanization has resulted in decreased deforestation. select the best answer from the choices provided mark this and return save and exit next submit