Integer Exponents and Scientific Notation: example 10.77

Convert to decimal form: $8.9 \times 10^{−2} .$

Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.

Your turn

The book's Try It right after this example: same idea, new numbers. Only the answer is given.

Convert to decimal form: $1.2 \times 10^{−4} .$

How did it go?

	$8.9 \times 10^{−2}$
Determine the exponent $n$ , on the factor 10.	The exponent is −2.
Move the decimal point 2 places to the left.
Add zeros as needed for placeholders.	0.089
	$8.9 \times 10^{−2} = 0.089$
The Check is left to you.

	$8.9 \times 10^{−2}$
Determine the exponent $n$ , on the factor 10.	The exponent is −2.
Move the decimal point 2 places to the left.
Add zeros as needed for placeholders.	0.089
	$8.9 \times 10^{−2} = 0.089$
The Check is left to you.