Answer:
42
we can use trigonometric ratios (cos, sin, tan) to solve this
[tex]cos(54)=AD/20\\20cos(54)=AD\\AD=12\\[/tex]
Using the pythagorean theorum we see that BD is 16
now we can use tan to solve for DC
[tex]tan(28)=16/DC\\DC=16/tan(28)\\DC=30\\30+12=42; AC=42[/tex]
Step-by-step explanation:
