Answer:
2/3 or 66.66..%
Step-by-step explanation:
First, add all the number of marbles and you get 6. Second you just divide the number of green marbles which is 4 by 6 and you get 2/3 or if they want it in percent then, 66.66..%
A^2 = b^2 + c^2 - 2bc cos a
= 11^2 + 5^2 - 2*5*11 cos 40
= 7.86 to 2 DP's
to find the remaining angles use the sine rule:-
a / sin A = b / sin B so
7.857/ sin 40 = 11 / sin B
sin B = 11 sin40 / 7.857 = 0.8999
<B = 64 degrees
so <C = 180 - 64-40 = 76 degrees
The answer is 11 degrees if you want to know why this is the answer reply to my comment
