Does anyone know the correct answer ?? Will mark brainliest

Answer:
c. 10.8
Step-by-step explanation:
this is bad but i did that work and i kept getting 10.6 and 10.8 is the closest so...
cos (45) = x/15 *put cos (45) over 1 & cross multiply*
x = 15 (cos (45))
x = 10.6
im sorry