Answer:
A. 6³ cookies
Explanation:
Miss Riley baked 6³ cookies which is 216cookies
From the problem;
Mrs. Riley baked 6 pans of cookies:
A B C D E F
Each pan had 6 cookies in 6 rows :
Pan A:
Rows Number of cookies
Rw 1 : A A A A A A
Rw 2 : A A A A A A
Rw 3 : A A A A A A
Rw 4 : A A A A A A
Rw 5 : A A A A A A
Rw 6 : A A A A A A
Each pan had 6 x 6 cookies = 36 cookies
So, for the 6 pans, we have 6 x 36 cookies or 6³ cookies