Question

How do you simplify `(3.89)^-5*(3.89)^6`?

Answer 1

General Rule for Multiplying Numbers with a Common Base:
`color(white)("XXXX")` `b^m*b^n = b^(m+n)`

For `(3.89)^(-5) * (3.89)^6`
this becomes `color(white)("XXXX")` `(3.89)^(-5+6) = 3.89^1 = 3.89`