Question

How do you simplify `(5^-1)(3^3)`?

Answer 1

`(5^-1)(3^3)=color(green)(27/5)=color(green)(5.4)`

Explanation:

`(5^-1)=(1/5^1)=(1/5)`

`(3^3)=(3xx3xx3)=(27)`

Therefore
`color(white)("XXX")(5^-1)(3^3)=(1/5)xx(27)=27/5`

...or if you want this as a decimal fraction:
`color(white)("XXX")27/5=54/10=5.4`