No 8,9,10 please tolong

9. B. 29
= 29x29x29
=24.389

8. √784= 28
√49= 7
√289= 17
28+7= 35-7= 28 (c)
9. 3√24.389= 29 (b)
10. Luas foto= 18×18= 324
Luas karton= 23×23= 529
529-324= 205 (d)