Hi just curious when evalutating 5^-2

Question

Would the answer be 25
Or would it be 0.4 = 2/5

I am lost

Answer 1

Neither.

Notice a^-2= 1/a^2 That is by DEFINTION.

1/25=.04

Answer 2

http://www.google.com/webhp?source=search_app#q=5%5E-2+