Question

express each of the following numbers in usual from. 9x10^-4​

Answer 1

it is right answer

9×10^-4

=90^-4

=85

Answer 2

Answer:

.0009

Step-by-step explanation:

$9 \times {10}^{ - 4} = 9 \times \frac{1}{ {10}^{ 4} }$

which is equal to

$9 \times \frac{1}{10000} = \frac{9}{10000} \\ \\ = .0009$