CAN SOMEONE PLEASE HELP ME ITS BASED OFF ARCS AND ANGLES ON A CIRCLE

Aefg - almn. find the ratio of aefg to almn. a)1: 4 b)1: 2 c)2.1 d)4: 1

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )

Sate why the measure of angle d is 120 degrees