Question

What is equivalent to 4.321 × 10−4 ? What is equivalent to 4.321 × 10−4 ?

Answer 1

Please write that as 4.321 × 10^(−4).  The " ^ " indicates exponentiation and the parentheses help make clear that your exponent here is a negative one.

Rewrite 4.321 × 10^(−4) by moving the decimal point 4 places to the left:

0.0004321