Question

Help please, quick!! (8th grade math)

Answer 1

D

Explanation:

using the rules of exponents

•
`a^(m)` ×
`a^(n)` =
`a^((m+n))`

•
`(a^(m) )/(a^(n) )` =
`a^((m-n))`

given

`((5X10^(4))(5X10^(-8)) )/(5X10^(2) )`

=
`(5(5)X10^((4-8)) )/(5X10^(2) )`

=
`(25X10^(-4) )/(5X10^(2) )`

=
`(25)/(5)` ×
`(10^(-4) )/(10^(2) )`

= 5 ×
`10^((-4-2))`

= 5 ×
`10^(-6)`