Square root of 48 plus square root of 3

The function c(n) below relates the number of bushels of apples picked at a pick-your-own orchard to the final cost for the apples. it takes as input the number of bushels of apples picked after paying an entry fee to an orchard and returns as output and returns as output the cost of the apples (in dollars)c(n) = 15n + 30which equation below represents the inverse function n(c), which takes the cost of the apples as input and returns the number of bushels picked as output

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

El piloto de un avión observa la pista de aterrizaje del aeropuerto de chiclayo con un ángulo de depresión de 30°; avanza 600 metros y el nuevo ángulo con qie se observa la pisga de aterrizaje es de 60°. ? a qué altura se encuentra volando el avión?