Question

Help Asap 15points pic below

Answer 1

`(1)/(r^(10) )`

Explanation:

Using the rule of exponents

`(a^(m) )/(a^(n) )` ( with n > m )

=
`(1)/(a^((n-m)) )`

Then

`(r^(2) )/(r^(12) )`

=
`(1)/(r^((12-2)) )`

=
`(1)/(r^(10) )`