Respuesta :

Answer:

21.3

Step-by-step explanation:

The equation sin(25) = 9/C can be used to find the length of АВ means

C sin the length of side AB:

sin(25) = 9/C ⇒ C = 9÷sin(25) = 21.295814248372

→ C rounded to the nearest tenth is 21.3