Sara found 58 seashells on the beach, she gave dan some of her seashells. she has 13 seashells left. how many seashells did she give to dan?
area of sector = area of circle × fraction of circle
= π × 24² ×
= π × 576 × = 72π units² ← exact value
area of sector = 72π units² ≈ 226.2 units² ( 1 dec. place )
the answer is d. no, it is not periodic. the function does not repeat on regular intervals.