Jupiter's four large moons -- io, europa, ganymede, and callisto -- were discovered by galileo in 1610. jupiter also has dozens of smaller moons. callisto has a radius of about 2.40 106 m, and the mean distance between callisto and jupiter is 1.88 109 m. (a) if callisto's orbit were circular, how many days would it take callisto to complete one full revolution around jupiter

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