Answer:
Around 7.5
Since the shaded region is very slightly less than half, we can estimate that the answer is somewhere around or exactly 7.5 since it is half of 15.
Adult tickets = A
Children tickets = C
A×4. C×2
A×3. C×4
A×2. C×6
A×1. C×8
The bases of trapezoids are congruent, the diagonals of an isosceles trapezoid are congruent
