Question

What is (2 x10^-3) x (4x10^4)

Answer 1

80

using the ' law of exponents '

`a^(m)` ×
`a^(n)` =
`a^(( m + n))`

2×
`10^(-3)` × 4 ×
`10^(4)`

= ( 2 × 4 ) x (
`10^(-3)` ×
`10^(4)`)

= 8 ×
`10^(1)` = 8 × 10 = 80