Question

Which of the following is equal to (9^-2)+(9^-1)/(81^0)(9^-2)

a. 0
b. 1/10
c. 1/9
d. 3/2
e. 10

please answer and explain

Answer 1

well,
9^-2 = 1/81
8^-1 = 1/9
81^0 = 1

so, combine the fractions and find your answer. Plain old arithmetic once you get past the powers.