Can someone please explain it to me ASAP??!!! This is exponential model

Devise an exponential decay function that fits the given data, then answer the accompanying questions. Be sure to identify the reference point (t = 0) and units of t. The pressure of a certain planet's atmosphere at sea level is approximately 800 millibars and decreases exponentially with elevation. At an elevation of 35,000 ft, the pressure is one-third of the sea-level pressure. At what elevation is the pressure half of the sea-level pressure? At what elevation is it 1% of the sea-level pressure? .. . . . What is the reference point (t = 0)? O A. the elevation at sea level, Oft O B. the pressure at sea level, 800 millibars O C. the elevation, 35,000 ft O D. 1% of the sea-level pressure Help Me Solve This View an Example Get More Help - Clear All Check