# A grain of sand has a mass of approximately .00000003 grams. How would this number be expressed in scientific notation?

##### 1 Answer

In scientific notation, the mass is

#### Explanation:

Scientific notation is a way of writing very large and very small numbers.

A number in scientific notation has the form

To convert to scientific notation, you move the decimal point until the new form is a number between 1 and 10 (

If you move the decimal to the right, the exponent is negative.

**Express #"0.000 000 03 g"# in scientific notation.**

**Step 1.** Move the decimal place to the right to create a new number between 1 and 10.

This gives

**Step 2.** Count the number of times you moved the decimal.

You moved the decimal 8 places to the right.

That means the exponent

**Step 3.** Write the number in scientific notation.