Answer:
x = 17.2
Step-by-step explanation:
[tex]x = 21 \: cos 35 \degree \\ \\ x = 17.20219293 \\ \\ x = 17.2[/tex]
17.2
Since this is a right triangle, we can use trig functions
cos = adjacent/ hypotenuse
cos 35 = x/21
21 cos 35 =x
17.2021293=x
Rounding to the nearest tenth
