Answer:
60(a+b) means that you would have to distribute
While 60a+ 60b is already in it's simplest form
Experimental probability it lands on the green is 8/20 = 2/5
Exp. probability it does not land on green is 1 - 2/5 = 3/5 or 60%.
Depending on if it’s a straight line, it can be 180 degrees
The shaded areas add to 2/5 of the area of the circle, which is given by
A = πr²
Then the shaded area is ...
(2/5)A = (2/5)π(10 in)²
shaded area = 40π in²