Atotal of 528 tickets were sold for the school play. they were either adult tickets or student tickets. the number of student tickets sold was three times the number of adult tickets sold. how many adult tickets were sold?

A = area of triangle + area of rectangular + half of the circle area

triangle area = 1/2 × base × height

triangle area = 1/2 × 3 × 5 = 15/2 = 7.50

☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆

rectangular area = length × width

rectangular area = 6 × 5 = 30

☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆☆

circle half area = 1/2 × pi × radius^2

circle half area = 1/2 × 3.14 × 3^2

circle half area = 1.57 × 9

circle half area = 14.13

A = 7.50 + 30 + 14.13

A = 51.63 m^2