Answer:
1/4
Step-by-step explanation:
Casserole received by Jackie and Alicie = 1/2 x 3/4 = 3/8 of the whole
Portion eaten by Jackie = 2/3 x 3/8 = 1/4 of the whole
7.5 m
circumference = 360/72 × 3π = 15π
so the radius of the circle =
15π / 2π = 7.5 m