Respuesta :

carlosego
For this case, we must use the formula given in the figure:
 sine (25) = 9 / c.
 From here we must clear the value of c to find the measure of AB.
 Clearing c we have:
 c = 9 / (sine (25))
 c = 21.29581425
 nearest tenth
 c = 21.3
 Answer:
 c = 21.3