The formula p=69.1/a+2.3 models the relationship between atmospheric pressure p in inches of mercury and altitude a in miles. Use the data shown with the photo. At which location does the model predict the pressure to be about 23.93in. of mercury? (Hint: 1mi =5280ft .)
(A) Sahara Desert (B) Kalahari Desert (C) Mt. Kilimanjaro (D) Vinson Massif