#8 you do 360= 112+136+x... then you solve for x. X=112. Now you divide this by two since it is an inscribed angle. For #9 I have this very simplified work in the picture. Sorry I did not do #10
I can’t see the picture I’m sorry if I can’t help you
B.) r(x) - e(x) = p(x)
Profit is how much money remains after the expenses are deducted from the total revenue