How is 0.00023 written in scientific notation? a. 23 x 10–5 b. 2.3 x 10–4 c. 2.3 x 104 d. 0.23 x 10–3

0.00023

Move the decimal point to the right, so it stops between 2 and 3, and the power of 10 becomes negative.

= 2.3 * 10⁻⁴

Option b.

I hope this helps.

Answerthe simplified expression isexplanationthe given expression is,let us deal with the bracket first.the two negatives in the parenthesis will become positive.the expression now becomes,we now expand the parenthesis to get,we group like terms to obtain,this simplifies to,