Answer:
she added 11 plus 10 wrong
Step-by-step explanation:
11 plus 10 = 21
1.
2.
3.
the answer is c,
826
82.6 x 10 to the power of 2 :
8.26 * 10^2
8.26 * (10 * 10)
8.26 * (100)
= 826