Answer:
4
Step-by-step explanation:
s is 2,1 t is 1
B. 9/91
-81/9 = -2
9/81 = 1/9
√9 = 3
√81 = 9
B is the odd one out; it's a fraction.
a) 5 is the answer
81
3^2
3 × 3
= 9
9 × 9
= 81
