Answer:
40/3
Step-by-step explanation: If you have a calculator type in (5 2/3)^2-(4 1/3)^2. To get 40/3. So in short, square (5 2/3)^2 to get 289/9 and square (4 1/3)^2 to get 169/9. Then subtract the two 289/9-169/9 to get 40/3.
5 2/5 is the answer as a mixed number
No they did not eat the whole thing. They are 6 out of 8 pieces of the orange. Therefore there is still 2 pieces left
= 
;
=