69/100 is not correct because 69 cannot be simplified into 6 if 100 is being factored by 10s
CB is equal to 10m you can tell this bye the side DC being 20 m and the angle of DC is half of CB so that means that CB has to be 10 m
Answer:
$ 1.6875 or $1.69 or $1.70
÷ 20 = - 100
or -0.01
there are two answers you can come up with choose wisely