Question

Evaluate 27 × a^-2 for a = 3.

1/3

1/9

9

3

Answer 1

I chose the last one :) am I correct ?

Answer 2

Well since a is 3,

That would make this

Do you know the rules of negative exponents?

Answer 3

Its 3

Answer 4

Show me how you got 3 and I'll tell you if you're correct :)

Answer 5

Ok, I dID 27 x 3 to the negative second power and got 3

Answer 6

I guess that's one way to do it. But according to Pemdas it should be solved like this