Question

Work out 4x10^8 x 5 x 10^-6 give your answer in standard form

Answer 1

`2.0 * {10}^(3)`

is correct ans

Answer 2

2 × 10³

Explanation:

a number expressed in standard form is

a ×
`10^(n)`

where 1 ≤ a < 10 and n is an integer

4 ×
`10^(8)` × 5 ×
`10^(-6)`

= 4 × 5 ×
`10^(8)` ×
`10^(-6)`

= 20 ×
`10^((8-6))`

= 20 × 10²

= 2 ×
`10^(1)` ×
`10^(2)`

= 2 ×
`10^((1+2))`

= 2 × 10³