I don’t understand math problem

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air

*15 pts* the graph of an exponential function of the form y = f(x) = ax passes through the points and the graph lies the x-axis. first line choices: (0, a) (0, 1) (0, 2) (0, -1) second line choices: (1, 0) (1, a) (1, 1) (1, -2) third line choices: above below on the

Which equation can be used to determine the reference angle, r, if 0=7 pi/12?